The more I've been comparing different information gathering methods, the more I've realized that sometimes you just need to have a "toolbox" of ways to collect information. (This may be obvious to some of you who've been doing this for a while, but maybe it'll help generate some ideas for other folks...)
I use a planner for my main system. I've got it set up (at least for now) the way that's best for me. Sometimes I can't get to it to record a note or idea. I have a Note section as an Inbox in the planner. So, what are my other choices..? Here's what I've been using:
1. Digital recorder - used when driving, great one handed operation (Sony IDC-35)
2. "Hipster PDA" - I read about this after someone posted it here and it's perfect for those quick and dirty notes you have to take. I've been able to write down a note while I'm teaching, without interrupting the flow of my lesson. The 3x5 cards are already a favorite tool of mine.
(Naturally, I try to process these bits of information as soon as possible)
I try not to have too many tools since that can easily lead to loss of information, but I think it's important to have some options depending on your situation.
What items do you have in your toolbox and how do they work for you?