Comment by SanjayMehta

I use a couple of slim A7 notebooks, one is like a diary, it gets stored when it's full. The other is a hard copy of my memory of how to do things like squishing PDFs. I rarely have to look at things twice as the act of writing it down gives me enough context to remember it. But it's invaluable when I need it.

Tried Evernote and tagging and so on and it turns out cataloging stuff is hard, and the lazy recourse is to over-tag, and then I end up doing a brute force search.