James Brausch in his post on How to Learn has a good idea for taking notes. It involves carrying a voice recorder around with you, and then every couple of days listening to your recordings and writing them down. There is an easier way.
jott.com will let you call a number (I have it setup in my cell phone on the speed dial and with a voice command, I can dial it with 1 touch) that will record up to 30 seconds of voice, and then transcribe it and email it and (if you choose) text it to you or anyone you have setup as a contact with them.
So, no more excuses! Record your ideas! Act on them!