This is really quite an interesting thing I stumbled on: life hacks. Via del.icio.us popular links, I found all of this group of "lifehack" links. It seems to be centered around a book Getting Things Done (?), otherwise known as GTD. One of the more interesting sites in the list is 43 Things. Basically it is a social network site where you list the things you want to do with your life, see others who have similar aspirations, and get "cheered" on.
Social networking becomes more and more interesting to me all the time.