Writepad

I don't put my schedule neither on the note nor the PDA or whatever like these. I don't even take any sort of writepad. In short, I almost cannot write notes. So far, it's just fine for me. But lately I feel hard to remember the schedule and even worth I can hardly put my thoughts together. So I began considering to take along a writepad. Which product is right for me? Or, should I bring a pile of waste sheets?