Have you heard of Tumblr? It sort of reminds me of Twitter, but with pictures. It's really fun to get lost! These are some of my favorites (so far).
Just be spLendid. A mixed bag of quotes and photos. Very uplifting and inspirational.
Home Sweet Home. I want to save almost every picture! So many great rooms and houses, all chosen in great taste and style.
Maluna. These are some of the best treehouses I've ever seen!