The longer you work at creating things, whether it’s software, websites, essays or paintings, the greater the odds you’ll hit a day of impenetrable dread. Up until then, you may have heard others describe burnout, but you just shrugged it off as superstition, or perhaps believed yourself immune. But the day it hits you, the world seems suddenly grey. What was once fun and challenging feel stupid and annoying. Or perhaps the things that used to motivate or move you don’t resonate at all. You feel nothing for them.
Scott Berkun, "How to survive creative burnout," UIWEB.com, June 2004 via Tomalak's Realm