I think working out a few times a week is harder than working out every day. When you work out every other day or three times a week or some combination, it is way too easy to think , "Oh! I exercised on Monday. I don't need to exercise today." When you plan in a DAILY workout it becomes so routine that you don't end up spending time arguing with yourself, you JUST DO IT!
My personal motivation is that I am SICK AND TIRED of being on this stupid plateau (210 lbs. for eight MONTHS!!!!) I want to fit into a new dress I bought that is in a smaller size, AND I really want to get to ONEderland!
I exercise every day. I mix it up between walking outside, doing WATP, Turbo Jam, yoga, weights, and my newest thing, step aerobics. I get bored VERY easily, so I plan what exercise I will do right along with what I plan to eat for the day. I put out my exercise clothes at the end of the bed and even stuff my socks in my shoes so I don't lose them. Having a regular DAILY routine makes exercise just like brushing my teeth or taking a shower. Believe me, I USED to fight myself all the time when I was staggering my workouts. Now I have also added an afternoon/evening workout on several days and may make THAT every day if this stupid weight doesn't hurry up and fall off me!
I have to admit that another motivation for me is my son who lost 75 pounds and who ran his first marathon this past fall. His fiancee is training for an ultra in August and ran 35 MILES two days ago. She plans on doing 62 miles of the 100 mile ultra in August. I watch them plan out their very healthy eating plan and work their days around their work and their work-OUTS. A measly hour of cardio or 45 minutes of weight training won't kill me, and I know I will be so much better for doing it!
Keep going! You can do it!!!