[robobro]

I use a Hipster PDA.

Step 1: get 3"x5" (~8cm x 12cm) index cards. They can be ruled, gridded, blank, colored, whatever. Step 2: Get a binder clip. Step 3: Clip the cards together.

It's pretty easy to get index card storage bins, and it's convenient to take around a little stack in your pocket. If you have a lot of cards, a rubber band works almost better than a clip, but it works better with fewer cards. There's a lot of templates you can print onto cards, but I usually just use gridded / blank cards for code ideas. An added bonus is, you can rearrange cards with different functions to help structure out code ideas. Or you can print out code, cut out relevant bits, and glue them onto cards.

I tend to manage task lists/todos, mind mapping, and pseudo-code on cards. Very handy on long bus rides.

[RUG3Y]

I use quite a few index cards as well. I recently outlined an ebook I'm writing, a card to each section. I'll use them to physically map out the flow of products as well - use a card for each feature/ button and move them around. I also use them to make drawings, some of which I saved and published in a zine.