[andersnolsen]

I carry a contractors cliboard in my bag with a stash of regular- and graph-paper (I print them - http://konigi.com/tools/graph-paper), especially like the dotted versions. I shuffle the new sketches and ideas to the back and clean them out once in a while. I do a lot of sketching as well so it's easy to add a clean sheet on top of my latest sketch and re-draw, test various poses and expressions. I've earlier used regular sketchbooks, but I find the contractors cliboard better. Gives you a solid board to put on your lap while commuting, you can easily discard a paper and start fresh, and it let's you store. Also - single sheets of paper is always avaiable.

A great point with using paper is that anyone can draw on paper. Just take out the contractors board, give your co-worker a pen and you're creating something together.

When I'm on the go and have some good ideas lying around I might shuffle them in with the other paper just to develope them further when I get a slot. The good ones get photographed and stored, the not so good I try to give a second round of thought and fresh sketches. If that fails it's straight to the bin.

I also keep a simple notebook app in my mobile which I use just for ideas. Lately I've been testing Trello and also Hollyapp.com, task tracking for nerds. I like the markup syntax of Hollyapp. Very fast to write. I like splitting my ideas to managable chunks and todos since I in the moment of the idea often have a picture on how to accomplish it. I'm writing more and more Markdown for this

A lot of credit to Mårten Agner http://angner.se/ for the sketching techniques I use daily.