Bad run > no run. I have to remember this, getting up and doing SOMETHING is better than doing nothing! That's why I ran this morning even though it was the last thing I wanted to do, and I felt AMAZING afterwards!
run with your heart instead of your mind. when you think with your mind, you think of the things you can and can't do. but when you run with your heart you forget about what you can't do, and you just go out and do it. run.