Sometimes less is more...
Lately I've found myself using the Notepad function on my cell phone to jot down any dialogue ideas that I have. It's quick and with me all the time. I can't count the number of times I've come up with an idea, only to forget it later just because I didn't have pen and paper handy (usually while driving).
I can see it now: "Officer, I wasn't texting while driving -- I was writing dialogue for my webcomic