Since at my job we are required to submit all receipts for expenses, I make heavy use of that app on my iPhone. There's another similar one I have as well. Snap a photo, it makes a PDF and emails it to me.
The one good thing about my horrible handwriting (if I need to write something down and other people need to be able to read it, I always print) is that I tend to take any and all notes electronically, which means they get backed up in multiple places. Even if I don't have a computer handy, I'll use my iPad to take notes. Could have used technology like that when I was in college - I recently dug out some of my old notebooks and some stuff I can't read, and I'm the one that write it all.