Google Calendar is kinda fabulous. It's such an easy way to let everyone know where I am, when I'm working, when I'm free to do study groups, etc. Even if I never use it for anyone else, it's so helpful because it lets Seanie check whether I'm working on his laptop, so he won't call every day and ask the same"What are you doing today?" question over and over again.
If only I could get my Mom used to referencing that thing. Life would be grand.