Examine your own lifestyle and determine if there are ways you can find exercises that fit your schedule and your personality. You're more likely to keep going if it's not a hassle that makes you miserable.
Losing weight isn't something you can simply will yourself to do, like getting out of bed in the morning. Rather, it's something that happens when you do other things, such as eating less and moving more, consistently over a period of time. The best way to help yourself lose weight permanently is to put your willpower into finding meals to eat and activities to do that you enjoy for their own sake. It's the pleasure and rewards you'll find in those foods and activities that will get you to do them consistently now, and continue doing long after you hit your goal weight.