Keep in mind that whatever goals you have to better yourself is going to take effort.
You can't rely on motivation. Sometimes motivation never comes or doesn't come often enough to make a difference. It's all about self discipline. Force yourself into new habits. Work out, diet, stop drinking/smoking. You're going to have to summon up your will power and stick to it day and day out. No matter how much it sucks, you're eventually going to be happy that you went through with it.
If you have a new years resolution, good luck.