1. OpenCourseWare– get access to material of all programs offered at MIT. Considering that you literally get world-reknown-proffessors’ notes, FREE, this is cool.
2. Thinkgeek– the place where you can buy (or just view i.e ‘windowshop’) all sorts of handy and not-so-handy cool geeky gadets.
3. Bored? If you are, this great site is just what you need. Go ahead, kill some time.