TTGF has a great post about why he weighs himself in the morning. This was my favorite though:
It motivates me to exercise in the mornings. If I go out for a run before weighing myself, I know from experience that I’ll lose maybe a half to one kilogram (1-2 pounds) from sweating. Some might call it cheating since you’ll put that weight back on as soon as you have a drink, but if it motivates you to exercise so that you can clock up a slightly better score, it can’t be all bad! I find this motivation is especially powerful if I gained weight on the last weigh-in.
This is genius. If you struggle to stick to a consistent exercise routine this might just be the perfect mind hack for you. Personally I prefer to exercise in the morning. But lately I have been staying up too late working on the site and I'm struggling to stick to my exercise routine. I might have to give this strategy a try.