This isn't specifically about courses, except that there are web sites I use periodically that I bookmark to my computer. These are sites I may use when building courses, but then if I'm traveling I don't have access to the bookmark. A good example is the Pixels to Inches site David Anderson recently blogged about.
What are some/any that y'all using for online bookmarking? Some of the most popular, I guess, are Diigo, Delicious, and Pinboard? Any "best" suggestions?