I know I'm the newbie here, but I just wanted to say that I know what you mean as far as motivation. I've been having issues with staying motivated lately. I keep blaming winter, lol. I've noticed that I do the best when I just get it in my head one day and am all gung ho with it. If I'm forcing myself to diet and exercise, but don't really have that strong drive, I find that I quit really quick. So in the meantime, I at least try to make sure I'm exercising at least until I get to that point that I'm really wanting it, ya know?
And you have to find what works for you. I know my husband is big into the gym and weights. My mum is way into the rec center and the cardio machines. Those just don't work for me. I mean, I don't mind doing them on occassion, but it's not something that really gets me going. I actually like the home workout tapes. So I would just mess around with different things and find something that holds your interest