The best motivation, experts say, it's health. Because it never becomes obsolete, like an outfit or a guy that you might not want anymore, for instance.
Think about the health benefits of weight loss (I mean, of having a normal weight!):
- less risk of heart disease
- less risk (or better management of) diabetes
- no more swollen feet
- etc etc
and of the various benefits of exercising regularly:
- increased levels of serotonine -> happyness or at least reduction of depression symptoms
- stronger bones
- more oxigen for the brain
- (can't remember now but I've seen a list somewhere and they are definitely more).
Another way of keeping your motivation alive and improve your methods is, in my experience, to read regularly, for instance on the internet, about weight loss, diets, exercise and the like.
Good luck!

i actually feel a lot better if i excercise, so that usually motivates me.

Well, how about this:
Do you like music and dancing? If you do, maybe you can try tuning in or playing a song you like the moment you wake to get yourself going. Do a warm-up 'dance' just before and after your exercise routine to psyche yourself up. Once you're done exercising, don't bother looking at the scale, because although you may be building up good muscle that tones your body and burning fat, the scale will not be able to tell you that.
As for diet, try treating your body as s sort of 'research project'. Only you can control what goes into it, so if you're really determined to keep eating healthy every day of your life, you have to stick it. Although I'd recommend you spoil yourself (in controlled rations of course) once a week so that you don't get overpowering cravings for food you're not allowed to eat :p and also since you'd have something to look forward to after your hard work of sticking to your diet.

get a picture of a person with the sexiest body alive and put it up where u can see it every morning...THIS REALLY WORKS

The most successful way to begin an exercise routine that will last a life time. Is to create small attainable goals that will challenge you and allow you to reach your final goal. Set a time allowance to meet and exceed that goal. For example someone that runs a mile in 7minutes wants to run a mile in 5.5mins. They need to cut 1min30secs off that time. So in order to make it challenging and attainable they will try to cut their time by ~10seconds every week for about 9 weeks. It will be easily done in the first weeks then it will become a challenge but it the end it will average out and they will meet their goal. Same with any other goal such as body fat loss(weight loss is a terrible thing to do), muscle increase, diet change, etc.

if you want to be healthy then just make your mind up to do it it isn't had to do but you have to do it for yourself

I keep a really bad picture of MYSELF around so I can tell myself that I don't want to go back to looking like THAT again! It really works. I've lost 50 pounds so far and I'm not going back.

I just get up in the morning & before i have a chance to think about skipping a day, i get started, i dont deny myself any food, i answer all of my cravings but i do so in moderation. when i first feel hunger pangs i drink a big glass of water before eating to see if it is actually thirst that i am sensning. It also dosent hurt the my husband & I work out together & keep each other motivated

Buy an expensive outfit thats too small, and force yourself to loose weight so you can fit in it.