I hate the treadmill, so generally I either avoid it like the plague, or try to make my treadmill runs go quickly. I did speedwork on the treadmill today: 1 mile warmup then 2 x800 at 1 mile race pace (8:50 for me). I following this with 20 minutes on the much-more-tolerable elliiptical, then ab work, foam rolling, and stretching. My "long" run, 6 miles, is tomorrow.
When I first started running, I only ran on the treadmill. It was "safe" and no one could see me in the loe-traffic courtside room at the local Y. I was afraid to go outside for a few reasons: 1, I thought my run-walk strategy would make me look ridiculous, and 2, I was afraid of the passerby making fun of a fat girl running.
I did eventually make it outside. And it was, and sometimes still is, scary. But anything is better than the treadmill.
Do you run inside or outside?