Here's a nice roundup of a variety of inspiring and thought-provoking websites worth checking out when you get a chance.
1X - Quite possibly the most amazing collection of photographs I have ever seen in one place. Get lost in the beauty.
500px - Another stunning selection of photography. Browse hundreds of collections by both professional and amateur camera junkies.
The Cool Hunter - Beautiful architecture and design from around the world.
Crispme - A great source for art and design inspiration. Features gorgeous photography, vivid illustrations, and artist highlights.
High Existence - Ponder life in a variety of ways. Inspiring quotes, thoughtful articles, and tons of other thought-provoking material.
The Quiet Place - Take some time to relax.