How much is "limited" for daily fats, oils, and sugars?

I'm going and trying to start eating more healthy. so i made my own my pyramid thing that they say you can do at mypyramid.com. but the only thing I'm confused on is the part about the fats oils and sweets where the allowed amount is "limited" ....how much is "limited"? i have no idea. /...is that like 1 brownie? ...or does it mean just some salad dressing? or does it mean salad dressing and 1 brownie? or something totally different? i don't have any idea, someone please help!