Ravelry is very cool.. instead of having all these sticky notes in pattern books of projects I want to makeI can just Queu it in Ravelry and chart progress, look at other peoples profiles that are making the same thing, post pictures of progress, find out from others if they had the same problems with a project or were happy with the houtcome and join groups relevant to my interests etc. I've started The Curvalicious Sisterhood there and have found a knitting group in Alabama as well as one for horse lovers!!
I can inventory my books and patterns, my stash, my needles and print a cool card with all my needle inventory so when I'm out shopping I know exactly what I need to complete my inventory.
I never saw the "cool" in Ravelry either until I joined and got into the whole thing, but this is WAY cool. It took me maybe a month or 6 weeks to get in once I applied but I'm having a blast there