When I have a lazy week, I look for something to motivate me for the next week. I might start a challenge with some friends or challenge myself. My sister and I have renewed our committment to going to the gym. A buddy system definitely helps with motivation, I think. I feel like I've lost some of my motivation lately, so I bought a new, fairly inexpensive machine to change my routine. So I guess my suggestions are - a friend, new routine or new type of exercise.