I of course love etsy.com. I sell my invitations and announcements on there, but sometimes I just start browsing, wishing I had hundreds of dollars to spend on all the amazing artists. I have bookmarked a bunch of things and promise to share an inspiration post with those soon!
A couple of years ago, I found Polyvore.com. It is SO much fun to play with. You can search all these different clothing options and build your own style board. Plus, it's a social site so you can friend people (make contacts?) and see all of their collections. You can also do it for interior design. Fun stuff!