As someone who's been trying to pick up a consistent task tracking system, I have a question: Do you just always have a notepad with you? I tried something similar to this with a pocket-size notepad, but it was annoying and didn't fit very well with a pen.

So far the closest I've gotten is having a Google Doc, but it doesn't have the same flexibility that a hand-written notepad does (e.g. symbols, indexes, ease of writing/ access).