Centre for Learning & Performance Technologies has come up with a list of the top 100 Tools for Learning http://www.c4lpt.co.uk/recommended/top100.html . I learned of this list through an article in The Chronicle of Higher Education: A list without libraries http://chronicle.com/wiredcampus/index.php?id=2288.
Check out the list of tools, and see how many you already use - and how many you want to try out!