Sometimes, you need to look at something completely the opposite of what you are doing.http://www.curatedobject.us/the_curated_object_/opens-201102/
Or sometimes, you need an inspiration.
You get in a rut. You hit a wall. Your muse leaves town.
Here's a website that will keep you going for months. It is so deep, so varied, so wide, you can mine it for days, months even.
It's every kind of art and craft you can think of. Organized by year, by exhibition, by country, etc. There are several indexes and ways to research within it.
It's eye candy for the soul.