I started with paper moved electronic and came back again and now use both.
Here's a thread I started a while ago on this topic:
Right now I'm using (subject to my changing whims of course ) Franklin Covey Classic size binder with 2 inch rings and 2 page per day refills and a Palm Tungsten T3 with Wi-Fi card and 1GB storage card. I velcro the T3 into the binder along with my Motorola E815 cell phone and the compact Palm keyboard.
It's a regular traveling nerd kit! But it works for me.