First is the New York Public Library's Digital Gallery... vintage images scanned to share with the world.
Fantastic! (found via Brain Pickings, another great place for brain grain)
Here are some vintage Halloween postcards found there...
I just found the site One Kings Lane, an online home decor site with rotating sales and items curated by leading designers. Some of it is more traditional than my taste, but some is just very cool. Antique and recent items, all vary and change daily. Great place to play around in the mornings for ideas!