Got a new brain today, and I'm trying it out. Frustrated with forgetting who I am on a regular basis, and wandering hither and yon on tasks, I got some composition books and will be using them as my geek-DayTimer/PDA.
As a side note, I never liked the appearance of toting around a DayTimer. Looks too "executive", which is fine if you are one, but doesn't if you aren't. I had a Palm Pilot for a while, and liked it, but pencil-and-paper don't have battery issues, and have a decidedly different geek-quality to them. Hard to explain, but there it is.