The forum is great for regularly reporting your progress (it helps to keep one honest!), self motivation and keeping a feeling that it's not a task that is done in isolation - we're all, or have been, doing what you are now doing - losing weight and becoming healthy.
Check out the tools and articles in the main website. there are some great sections that give advice on how to stay motivated and what foods to choose in order to feel full.
Weight-loss is simple - take in less food energy than your body needs, and over time your fat stores will be used to make up the deficit. The hardest part is the first month, but it gets easier. Never think of it as dieting either, since you really do need to learn correct eating habits that will stay with you for a lifetime.
Weight-loss is not something you do only when you're happy, or on weekdays, or when you feel motivated. It has to be always happening. Your eating decisions have to be consistent with a constant drive towards that final goal. You have to think and act like a thin healthy person.
I've also found that a food diary is useful. I use a standard diary and at the end of each day list everything I eat, and write next to each item a rough Kilojoule count. By keeping between 5000 and 7000 Kj per day on average a steady weight loss of between 2-4 kilos per month can be experienced, depending on factors such as exercise and body mass (which is why the tools exist on the forum's main website).
You'll enjoy watching your clothes become baggy and having to change down a size every few months. It's fun and definitely worth the effort.
Striving to improve in every way possible.