In the past I used 3 ring binders to store my notes. Then I moved onto using spiral bound notebooks, which I have several of (mostly dream journals) collected.
Since moving into the BALG current I have decided to go for a more formalized strategy, and started using composition books, so all my journals will be uniform. I imagine they will look nice stacked up on a shelf and be easy to look though and index as they grow.
Also of note is that I like the composition books since they have a simple sewn binding, and are much less likely to have pages torn out or ripped accidentally while moving them, unlike spiral bound or hole punched pages. Which can happen when these things are around for years.
I have kept some online journals, but that form is usually a simple text file I append to when necessary, and its main purpose is to store a record of offline material to support online forum posting etc. in case websites go down or disappear. I keep hard copies of anything I consider important.
For my dream journals I have simple written down what I could remember, marking those with lucidity with a further symbol to ease later reference. This has worked well and I continue to use this same process.
For my working logs initially I wrote down lots of stuff. My thoughts, feelings, what I thought things meant, etc. I found this gave me good insights about my personality and perspectives months or years later. However, this also severely detracted from the value of the journals for determining actual results, as my entries would go off on wide tangents that I thought were important at the time. Later I could see that I was simply more concerned with how I was feeling or what I was thinking about, than focusing on the Work.
At almost the same time as I decided to do the BALG courses and commit myself to magickal ascent and transformation of my material universe instead of mysticism, I discovered notes about a journaling technique on neuromagick.com that seems more beneficial in my own development of discernment and objectivity than haphazard note taking. Instead, this method uses the journaling itself as an additional training and process of development and ascent. I decided this method is what I will use from now. It’s redundant to repeat the method here, so I’ll post a link.