Pocket for blank 3x5 cards, pocket for written cards, and a place to keep a card for active use/ writing. I’ve carried mine for > 5 years at least. Pricey, but perfect.

I use a moleskine reporters pad, with a little loop taped to the side to carry my pen.

It is a nice simple notebook. I use the back pocket to store index cards (Since I hate tearing pages out of my notebook, even the perforated ones) and I keep a small clip on the front to mark the page I am at.

This is my second reporters pad, prior to that I used a standard pad and a filofax for years. The moleskine is a lot simpler and easier.

There’s a picture of it at http://www.flickr.com/photos/labeteslair/2125622283/

I find the capture method I can rely on myself to process most is Jott. I will often jot things on index cards, full sheet of paper, or in a notebook, but for things I want to make sure I process pretty soon, Jott rules.

Hipster PDA FTW. Just move the written on cards to the back, writing side out.

When something is REALLY important, I write it on my hand with a sharpie. That way, even if I forget, I always get somebody saying to me, “dude, why the hell do you have ‘cat bank milk’ on your hand? Aren’t you almost thirty?” Then I say, “oh yeah, thanks for reminding me!”

I put Post-It Notes measuring almost 3 x 5” on Cahier pages. Use them for notes, reference, lists, etc. Numbered the Cahier pages for the index but never write on them, just the Post-Its. I had the same criteria you did and this tool works.