workout

Last night I ran a timed mile on the treadmill and did it in 8:51. That's mighty fast for me. I think 8:49 is my personal record but that was on a track, not a treadmill. (I consider treadmill timed miles to be illegitimate, hahaha.) I'm pretty sure I'll break 8:45 the next time I do it. I'm way excited about that. The ultimate goal is to run an 8 minute mile by the end of March and an intermediate goal is to run an 8:30 mile by the new year.
I know what I need to eat, when I should eat it, and how much water to drink in order to do my best workouts in the afternoon. Sometimes I'm afraid to be my best though. I can't figure out why I occasionally sabotage my workouts. I think getting down to the most fundamental thing, when I am well-rested, I am able to make the best decisions for myself. I have willpower and discipline and prudence. And when I'm tired, all hell breaks loose.
I know lots of people talk about how wonderful it is to work out in the morning but I get super unmotivated super fast because my morning workouts aren't nearly as good as my afternoon ones. I'm weaker and slower in the morning.
I've played sports since I was five and sports practice was almost always in the afternoon/evening. So 20 years of conditioning had made me an afternoon workout person. And I don't do yoga either. Screw breathing.
Anyone know where I can get my body fat percentage measured in one of those water tanks?