I was thinking like malkin - maybe set a non-fitness goal, just so you have some kind of structure. Or hey, I'll throw pilates out there - my teacher is still teaching and taking classes and she's 6 months pregnant. I'm seriously impressed, b/c she's kicking my butt. And if nothing else, supposedly it makes childbirth much easier because you really learn how to control the right muscles!

Or maybe...involve yourself in someone ELSE's bike goals. Find a protege Someone new who needs help with a training plan, or needs company to get through rides that you might find less than challenging. Nothing gives you a new perspective on a hobby like teaching someone else.