I've currently hit "burnout" because I'm having to do a lot of dev work at work (I'm normally a tech support guy, but we have projects that need working on) so I'm taking a break.
For me, I find playing (rather than making) games helps me break out of the cursed dip, so I've begun playing Champions Online.
Everyone is different, I don't like coding too many different things at once, so having to work on multiple things at work means to me that working on my pet project is a hard slog and too much like "work". Playing games is a complete tangent, and you may find that you need to do something entirely different (take up yoga, knitting, go hiking every weekend, etc.) to get out of the funk. If I think of something and it doesn't feel like hard work, I'll jump in, sort it out, drop it again afterwards.