I use coupons sometimes but I am not as dedicated as a lot of people, like on this site. I would like to get better. I keep hearing all these people talking about getting all their groceries for next to nothing. I have a few questions I hope someone can help with.

How do you get discounts on dairy (milk, eggs, etc), meats and produce? All the shows I watch, I only see the people buying non perishable items. We go through 5 gallons of milk a week and I HAVE to buy things like protein shakes (I have 2 kids underweight). I see coupons for some of the protein shakes but I hardly ever see them on sale. They're still $10.00 or more with the coupon.

I also have NO room to stockpile groceries. Any help?