Actually, Linoit is online stickies for anyone. But they are particularly useful for me, as a teacher. I have a hard time keeping up with things I need to do. I used to have to-do lists everywhere. One at school - heaven forbid if I took work home and forgot the to-do list - and one at home. The at home one was usually divided up between things I wanted or needed to do in my artwork, and mundane stuff like paying bills or making a dentist appointment. I find these old to-do lists everywhere. I used to lose them all the time. But no more.
When I find out there is something I need to do, or if I have an idea I would like to try or research, I just stick it on a sticky note on my desktop. When I get an email requesting something, I cut the relevant stuff and put it on a sticky until I have a chance to do it. Nothing gets lost, and it's stored on the internet, so I can get to it from home, work, or my cell phone.
This has helped me become more organized and helped me to save the time I would otherwise be using hunting for my list! I hope it helps you as well.
Best of all, Linoit is FREE! Get your account at www.linoit.com.