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.
The Only Motivation You Need to Keep That Fit Resolution: You can try different things to keep your New Year's resolution (like say, using a great fitness app), but sometimes all it takes is a few motivational words.