Fast? Probably not what you really want to do.
You have to burn more calories than you consume. It's that simple. Eat better and less and exercise.
You really shouldn't lose more than about 1.5 ~ 2 lbs a week if you want it to be healthy. This is cited in many studies and articles.
It depends on what you mean by fast. If you mean 3 months from now, its possible with a lot of focus on your diet and activity levels. But even thats beyond the upper limit on how quickly you should lose weight (unless you are very overweight to begin with). Losing 2.5 lbs a week means you have to burn 1,250 calories more than you eat. Which realistically means you have to both limit your calorie intake AND do a lot of exercise. And stick to this every single day. Not easy.
The faster you lose weight the more likely you are to gain it back just as quickly. If you really want that 30lbs to go, and stay gone, you should think about losing it at about 1lb a week. Which would mean about 7 months from now.
Loosing weight is Calories in vs Calories out. Consuming about 3500 calories less than you burn accounts for about a pound of weightloss. Eat a balanced, healthy diet, a diet that you can stick to, workout as much as you can and as long as you consume less calories then you burn you will loose weight.
Tip: Be honest to yourself about your calorie consumption or burn, it's more motivating!
That is my "program" and I am down about 110lbs.