As you lose, you'll stay motivated as you see the weight come off. I know each time I get on the scale it excites me.
But to keep the momentum, make sure it's your lifestyle. Workouts should fit into your lifestyle (make it convenient). Pay attention to your food choices--when you look at your plate what do you see? Mainly breads, pastas, sugars, refined foods?? Limiting intake of refined carbs/sugars will accelorate your weight loss. When I compare my plate of food now to what it used to look like. before, it was 90% carbs, 10% protein, no veggies/fruit, now every meal is a serving of good protein, 2 servings of fresh vegetables or a serving of fruits/berries, and maybe a serving of carbs/breads (I try and keep net carbs to 100-175).
this damn tracker below hasn't been right in months! My current weight is 139!