I usually participates in question/answer communities to answer things, I almost never ask my own questions. As a result, I have various sources of notes I've

I usually participates in question/answer communities to answer things, I almost never ask my own questions. As a result, I have various sources of notes I've figured out and get high use/reuse from. I also do a lot of technical training at work, for both beginners and advanced users, so have a wealth of tried and tested content there. I've often contemplated writing an eBook on each topic and selling them on Leanpub/Amazon/Google for 5 or 10 bucks each. The idea of limiting myself to 6 pages per topic is appealing. That would force an economy of writing and density of content which appeals to me.