maybe find an accountability partner? someone who will call you in the morning and make sure that you are awake and exercising. The act of exercise isnt always going to be fun and enjoyable. and that's okay. imo, its kind of like school. Turning in a million little papers and homework and taking tons of little quizzes. getting up every morning to go to class, go to the library. It all sucks. but i do it because the end of every semester (and eventually my bachelors degree) it what makes it worth it. its my motivation to write a 5 page paper about climate. some classes can be fun, but mostly, its just getting it done.
likewise, exercise isnt the fun part. feeling great in my clothes, enjoying shopping, being able to go up the stairs at school without getting winded, those are the things that make it worth it.
Maybe write out a list of all the things that make your exercise worthwhile. better health. more comfortable in your body. etc. hang them up where you can see them, and when you don't want to exercise, or you want to quit before your routine is up, take a 5 min break and read them over, and then decide if its worth going back to the exercise dvd.
and honestly, once you get back into the routine of exercising, you wont hate it so much. it will just be a normal part of your day that gives you energy and makes you feel great.
sorry my post is so long, ive been working on ways to motivate myself too