Arguments can be made for either side:
Paper is at your finger-tips and doesn't crash and burn; electronic comes with back up if you loose the original.
What do you use? Convince us why your way is better than the other. This recent post from Lifehacker makes a case for using paper, as does Maxwell here at AT (at least when he wrote this post...we'll have to check in and see if that has changed in the meantime...).
And if you use paper but want to learn about options for migrating to electronic, make sure to let us know about that too.