When you don't feel motivated, and nothing – no affirmations, no visualizations, nothing – can get you exercising, that's when you need to close your eyes and just do it anyway. Don't think about how hard it is to take that extra mile. Just do it. Think instead of the new wardrobe you're going to buy once you've met your goals. Think of sex, anything to get you through. The hardest times, if you master them, can push you to higher levels of health and fitness. So now is not the time to stop. Do something different. Sing while you work out. Change your walking route. Buy pretty new sweats.
I'm not going to stop. I'm going to keep on keeping on. I can do this.