I did have a PDA, but then found myself STILL using a paper to-do list, even though there was a to-do list function. I'm very visual, and the little dinky PDA was just not IN MY FACE enough to remind me. So, I invested in a Franklin Covey paper planner and LOVE it. I can put my todo list, and a schedule on the same page, and I have room to write other notes or lists. Works great.