Lookup ba gua feng shui and make sure you’re complying with the basic rules in your place of business (includes home office) - I find this more reliable and effective than the traditional method, perhaps because that’s optimised for China.
Don’t go crazy buying cures, or books, you can find the basics online.
Consider a small idol of Ganesha and maybe Lakshmi beside the till/computer that you see your income on, ask them every day to please help you grow your business, and offer them some stick incense if you can, but don’t go crazy and spend more than you can afford, and end up resenting it.
Buné and Clauneck will both assist with business growth, I have more experience with Clauneck for this but Buné had other good reviews on here:
Read “Think And Grow Rich,” which is well and truly out of copyright and available online, also “Napoleon Hill’s Keys To Success” which I’m not sure of the copyright status of.
“Secrets Of The Millionaire Mind” by T. Harv Eker is worth buying 2nd hand as soon as possible, to understand how to handle money, even if you think you have none at all, if you have any coins or notes in your possession you need to read this. It’s actually like a working manual of the psychology of the energy of money itself, I found.