I love using Gmail and Google Calendar. The only problem I’ve had with Google Calendar, is that I forgot to check it, and then forget something I scheduled. Here is a greasemonkey script, and a tutorial for setting it up, that places your Google Calendar agenda on your GMail in the left hand side. Fantastic idea, and now makes it much more likely I’ll not forget my scheduled events, since I’ll see them all day long.

See the tutorial.