When I´m on the road (and I mean that literally) I simply record a voice note in Evernote on my iPhone and then tag it with @todo. I try to get into the habit of checking this tag for notes every morning when I open Evernote and then take actions, like turning it into a to do in Remember the Milk or write down the note. Evernote already has an excellent OCR feature. Now I wish it would have the same for voice or music and sound in general. Imagine Evernote would recognise not just words but also music, like the Shazam app on the iPhone.