You think you need extra motivation to stick to your exercise routine? Find out what these lapsed gym goers did to get with the program. "I put the receipt from my really expensive gym membership on my alarm clock--looking at it makes me want to get my money's worth." Alberto, 27, Honolulu. "I only buy cheap shampoo and conditioner for my home because my gym has better brands. An hour on the StairMaster equals shiny hair." Amy, 26, San Francisco. "I always park my car in the lot that's close to the gym. That way after work I have to walk past it and feel…