Diigo

I have found online bookmarking sites to be very helpful when I find cool new sites that I want to remember.  In the past, I would copy the link (when I was at home) and email myself the link.  It was very inefficient because my mailbox would fill up and it would take me a long time to sort through my mail.  Last year I signed up for Delicious and added a bunch of bookmarks.  Now I can just click on my tags and quickly find what I was looking for.  Diigo has some cool features where you can highlight and make sticky notes so I can remind myself what I wanted to look at on the site.  I am definitely a big fan of online bookmarking.