Well, not all fats are bad. Most people think that fats as a bad thing for them.
But that is not true! So don't be lazy and educate your self and find out what fats are good for you and what are not.
You can find lots of info's about fats in
Dr. Atkins' Diet 
This book helped me lost 19kgs 2 years ago and to keep my weight under controls for 2 years (no boomerang effect).