Be more active. The whole "I'm going to starve myself" option most women do is plain stupid. Anyway, losing weight by toning up actually makes you appear more attractive than starving it off.
Do lots of repetitions of a light exercise, or do something like running, even if it's for fifteen minutes. It'll make a lot of difference if you do it every day, even if it's just light. You'd be surprised.
Also, the Wii Fit is actually a great motivator, more than anything. It only shows you how to do exercises you can normally do, but it's very good at actually monitoring what you're doing, pushing you in the right direction, giving some helpful(ish) tips, and encouraging you to set a goal.
I'd get it, if you think it's more a sake of motivation more than anything, otherwise you can Google all the exercises it gives you.
Also, bear in mind muscle. The Wii Fit displays only BMI and weight, then tells you how close you are to your ideal. It dos not take into account muscle; if you did/do something that involves building muscle (particularly in the legs, such as riding or skating) then you'll have a higher BMI anyway. Best to use it as a rough guide to where you are comfortable.
Oh, and lastly, having three larger meals and not lots of little ones. Lots of women seem inclined to have the same amount of food but in more frequent, smaller, portions. This actually reduces the reduction in fat-tissue, because your body doesn't burn up it's 'reserves' because it believes it is getting a constant supply of meals.
Just, don't go getting all anorexic. Scares me when people do that...