How do you deal with self motivation?

I struggle with a positive reward system and self motivation. Do you have any tips on how you keep yourself motivated to keep up with your responsibilities such as; school work, a job, relationships, exercising, and eating right? I just cannot seem to motivate myself to be consistent so I am able to reach my goals. Any stories of learning how to motivate yourself or tips will be appreciated!

I have found a couple of things help. One is to postpone something I want to do. For example, I decide to wait until I did housework before I watched a DVD. Another thing is to put a limit on something that isn’t productive. I will decide that I am going to watch TV or take a nap for just an hour. Then I will do things that I need to do.