I use a small (paper) pocket calendar. I keep my phone and email contacts in it, daily appointments, etc. It is a single, centralized item; not dependent on batteries or other power; not subject to data corruption unless it gets so wet the writing smudges. Sometimes low-tech is the most reliable.
I've never gotten into using day planners and calendars. I've had too many who's only purpose have been to lay around and collect skin flakes. If the off chance occurs that I for some reason believe that I would forget something, I would simply make an entry on my cellphone. But for most cases I rely on my memory.
man. i also use moleskines. but that's all for note taking.
ideas that pop in my head. need to catch them before
they float away. in that case, always easier to write
so hipster. makes me want to find horn rimmed glasses.
i usually organise everything on the computer then
sync sync sync. i hate fighting with the phone.
Thats what I mainly use. Unless its something very important, it usually goes straight to my little notebook instead. i hate waisting time writing it on a computer/cellphone, when I can just keep it on my notebook that I carry around everywhere. I always just double check it all the time.
I actually dreamt I lost my little book, I woke up freaking out .
I spend so much time on the computer I find it helpful to get away from the comp for a while and do most of my planning in a good old 2 page a day Franklin Planner (Daytimer), classic size (~4" x 6" pages). Plus, I have made a To Do blog here in the forums to keep me motivated.
Buy a nice leather bound planner, some enjoyable pens etc. in order to make the process somewhat less onerous. I find my best planning time is at night, and then in the morning I am not trying to start the day off by trying to figure out what to do.
I use a Franklin planner too. I use the wirebound one because I find it more portable.