A few things I've found inspiring lately:
1. This post about Paris from the blog sfgirlbybay. The colors are so lovely.
2. Making paintings about what you eat, like Riki Takaoka, as seen in the blog The Best Part.
3. Work by others in Moleskine notebooks. I usually sketch in a Moleskine sketchbook. This site would work better if there was a next button to click through all of the images, but it's still fun.