I have a Mac and I use iCal for everything. I have my computer set up to turn itself on every morning a half an hour before I'm officially open for business, and I have iCal set to open upon startup. This way I get a look at my daily agenda first thing. I then hand write a checklist for the day's activities to follow. Writing it out by hand helps me follow through. I also add everything into my Blackberry so I have it when I'm mobile. I always look at the planners and calendars when I'm in the store, but I really have no use for them anymore.

I admit...I'm a nerd.