I have a Biggest Loser calender and on each day, there is a check box for Exercise, Food Plan, and Calories. So each time I exercise I put a nice big check mark beside it. Throughout the week, it's very motivating to see all the checks filled in! It keeps me on track. Also, every Tuesday it's weigh day so seeing my progress each week helps out too!
My boyfriend often motivates me and encourages me to go to the gym on days when I feel off. He can also remind me that I should make healthier food choices when I'm crazy something junky