Habits

Get a Friend. The thing that works for me is to find someone with the same schedule and goals and make a plan. It's hard to hit the snooze alarm or write just one more report at work when you know someone is waiting for you. Accountability is key. Also - they say if you can do it for 30 days it becomes a habit, so maybe you could make that a goal with a friend.

Get a trainer. If you can't find a friend to go with you, consider hiring a trainer for a limited number of sessions. They'll help get you on track and keep you accountable..

Rewards. They say that it takes 30 days to break a habit, so I imagine it takes the same amount of time to form a habit. However, as you are not going to the gym everyday (I assume), it's going to take a few months to train yourself for this type of behavior. Much like dog training (do I sound like Dwight on the Office? I think I do right now) you need to offer yourself a reward for behavior that is conducive with what you were trying to achieve. Pick out something that gives you immediate satisfaction after going to the gym and reward yourself with it. Unfortunately, a lot of our personal rewards can be based around food, so if that is your solution, try and come up with additional rewards as well. Some ideas would be - an extra hour of tv time, even if you do have things you "need" to do, listening to the Madonna True Blue album (or like guilty pleasure) at full volume in your car, setting aside $5 every time to save up for that Coach bag that you want. Whatever it is, rewarding yourself for taking baby steps to achieve your goal is one of the best ways to coax yourself to get there.