Here are some sites I enjoy:
Get some great Hawaiian merchandise!
If you have a dry sense of humor, check this site out!
Here are some sites that have to do with math. Feel free to let me know about other great math websites:
This site has some introductory tutorials on graph theory, which is an exciting branch of mathematics. You can take miniquizzes as you go  they're really fun!
This site could be just what you need if you want to brush up on your algebra skills, or if you just have a quick question about a particular topic.

