My favorite thing I have learned about so far in the Web 2.0 class is Diigo. I have used bookmarking pages before (mostly Delicious) but wasn't impressed with the format. Diigo is much simpler to use, work with and share. I have already downloaded the tool bar onto my laptop and desktop at school and I have shared this tool with others. Right now, I have 17 sites saved to my library but I am finding more and more each day. I do have personal and professional sites all in my Diigo, but will probably changing that to all professional. If you would like to check out the sites I have saved to my library, here is my url:
http://www.diigo.com/user/aprilmgarrett
Also, if you have any sites you know of that I could add to mine, please share!!