Kind of, it’s not so much the writing, as that second stage - look at whether what you wrote is true. Do your actions and conscious choices bear it out? 
In the example of someone who wants to be rich, that states that the desired end-state is to FEEL rich, because we go by how we feel: what we’re aware of creates an emotional state in us that we compare to our current state, and we think we’d prefer that state of feeling rich to the state of feeling poor.
So someone who’s saying “I want to be (aka, to feel) rich,” if all they do is sit worrying about money (especially worrying without having an exact budget or grasp of their real financial situation - ostriching, as it’s sometimes called) - then they’re saying one thing, but doing another.
They’re not only making sure they are being, feeling, poor, but also, totally out of control of the money energy in their lives.
A better tactic would be, first, to get realistic about their current financial situation (like someone who manages a lot of money would expect to be), second to avoid dwelling on poverty, which is saying “Hey, I want to feel poverty!” in terms of the ACTIONS taken, and third, do stuff like read about investments, global markets, even just history of money, anything that’s a positive part of the current of money.
Then, start managing what money there is, no matter how small, ideally using the methods in that Secrets Of The Millionaire MInd book I recommend, and of course add some sorcery and whatever to the mix.
But the primary thing is to avoid dwelling on, ie “being,” feeling, poor. That just tells the universe you like that shit and actively seek it out, so it will usually oblige you by sending you more of the same.
Be a welcoming host to the money current in all ways, and don’t bitch out its current shape or size by dwelling on everything you dislike, any more than you would with a powerful guest you wanted a favour from. If the CEO’s daugher from a company you wanted a job with came to stay at your house, you’d hardly spend all day telling her that her ass is too bony, and she has terrible teeth.
If you want to “be” as in feel rich, do what you can now in that direction: think of things you’d keep in your life, your home, even if you were a multi-millionaire. Focus on those whenever the old thought patterns re-occur, knowing that “with this thing, at least, I am rich, I am complete.”
By doing that, you’re BEING, feeling, rich, and making room for more of the same, showing that current a welcoming home.
Enjoy what you have, enjoy paying bills, because they’re probably a fair chunk of your income and so they’re the biggest chance you get to spend money - enjoy the fact utility companies owned by fellow millionaires have trusted you for a month or a quarter with their services, because they know you’re a person of substance.
Your landlord’s not greedy, he’s someone who knows you’re good for that much money every week or month, and when you spend the money, or check the debit’s been made, release it with joy, knowing that you’ll always have more. Money does like to flow, so enjoy seeing it doing that.
So, tl;dr
make sure the way you CHOOSE to feel aligns with what you state you want to feel, in the future - we don’t attract what we WANT, we attract what we are.
See everything as currents, looking for homes to flow to, and all the things presently in your life as representatives from their current, or kingdom.
And here’s one weird trick I just recently grasped:
most mainstream books about Law of Attraction emphasise (not incorrectly) gratitude: keeping a gratitude journal every night before bed, taking time to be grateful throughout the day, noticing small things for gratitude practice.
I don’t know about you but when someone hands me homework with its own exercise book, hits me with the implied guilt that I’m being Ungrateful if I don’t complete it every night (for the rest of my life), and then tells me how to feel, I get kind of… uncomfortable. 
Gratitude itself is one of those words that has a vaguely guilt laden and preachy feel to it, I imagine most of us were told to “show some gratitude” for a thing we disliked as a child, worse if it was a present we’d been looking forward to, and then when we unwrapped it, it turned out to be something unwanted.
You can skip all that by taking the view of everything as an ambassador for its kind – the shack you live in right now is just a low-ranking (but well-connected) emissary in the Court of Houses, the rust-bucket you drive is there from the Kingdom of Cars to see what kind of a host you’ll be, to a BMW or a more lordly motor: and if you’re single, that side of the bed, the primeval state of your personal grooming, and the extent to which you’re a catch, are all interacting with the cosmic consciousness, telling it what kind of husband or wife you’ll revert to after the honeymoon glow has worn off – and ONLY going to attract people who vibe with that. 
They may not be the manifestation of Car and House you want, the empty space in your life may grind on your nerves, but if you could just conceptualise them as a representative, as a Part One, introductory version, then it becomes easier to treat them with respect, understand that their presence IS, still, a blessing (after all, some people have nothing), and to begin seeing yourself as someone with these things in your own life, your own personal spiritual court.
I’m going to hop to a different metaphor for a moment: tennis.
You don’t get to play tennis well without, first, playing tennis badly, and you don’t get to be a tennis champion without graciously handling the early stages of some very bad tennis indeed. Same thing, really: you have the bad tennis before the good, and there’s no point breaking your racket or beating up the coach just because today, your game’s not where you want it to be.
You feel the love for the tennis current, and persevere, learning and observing the early stages as a part of a far bigger picture. And you probably don’t sit and hate on better players - you may feel mildly envious, but you see them as a chance to learn, not as people who hogged all the tennis energy, so now you can’t get your fair share.
(That’s another weird trick of LoA - bless those who have what you want, or at least, desist from a festering hatred of them. That hate attaches in your own mind to the concept of success, be it tennis excellence, “smug marrieds,” rich people, whatever, and tells your brain that is NOT safe and desirable territory to operate in.)
Back to the emissary metaphor! 
You may find it easier, then to be appreciative – a much nicer word, IMO – of the things that exist right now in your life, even if they’re not where you aspire to be, because they’re a start – they’re part of that energy, reaching out to you, being present in your life.
Courting them, interacting with them graciously, seeing them as the first stage of the awesomeness of their kind, and considering them not as things you’re entitled to, but as forces blessing you with their companionship, may be easier to reconcile with a black magickal practice, than exhortations to show gratitude, and make lists, and drag up a false feeling of cheeriness and humility, which you may just not be able to find at the end of a long day. 
Hope that’s not too confusing, just trying to brain dump what I have before the weekend, when everyone clears out and does cool real-world stuff. 