Some photographers may have « writer’s block » (or photographer’s block, more acurately) and feel that they no longer want to shoot pictures. I found two answers to this problem on the Internet.
The first one is a a series of advice by Photocritic: 10 ways to prevent photographer’s block.
- 100-step challenge: Walk 100 steps, then shoot from there. It may be a nice walk anyway…
 - Recreate a photo you love
 - Visit great photographers web sites
 - Self Portraiture
 - Rapid Fire: 120 minutes, 120 photos
 - Play the Random game: Illustrate a random word (every day)
 - Look for inspiration in Flickr interesting photos
 - Try something new (HDR, panorama, macro, flash, etc.)
 - Don’t shoot any photos, come back to old ones
 - Stop procrastinating
 - Help your fellow photographers
 
The second one has been found by a bird photographer who started to be bored. He decided to aim at shooting photos of 1000 different bird species. Feasible, But not so easy. His web site: 1000birds.com.