Priceless advice has been given so far!
I decided to try something because I was tired of looking in the mirror and trying to convince myself that I wasn't that big. I would look at pics of myself and feel "ugly". I was tired of people looking past me or looking at me as if I was deformed. I have been this way since I was 8 (I'm 24 now), enough was enough. I was tired of not being myself for fear of ridicule.
I started by just cutting out fatty foods and reading my labels. I tracked my calories, cooked all my meals and so far I have lost 9 lbs. I'm extremely vain but I know I will be smoking hot when I get this weight off because I will be able to present myself to the world with no holding back. That means more to me than the hideous stretchmarks all over my body and the potential for loose skin.
Like someone else said, just start small, eat breakfast, take a walk. Don't hold yourself back because if you wait that could have been another day that you could have been getting closer to your goal.
Good Luck on your journey!