What are the best ways to do so and what are the rules/limitations?
From the US Department of Customs and Border Protection website:
"Bakery items, candy, chocolate, and cured cheese are generally admissible. Canned goods and goods in vacuum packed jars (other than those containing meat or poultry products)are also generally admissible if being imported for personal use.
Dairy items such as milk, yogurt, butter are generally admissible, although this is subject to change, depending on disease outbreaks. Eggs may be admissible, although frequent outbreaks of Exotic Newcastles Disease and avian flu make it very likely that they will be denied entry. Hard cured cheese such as parmesan or cheddar are generally admissible, soft cheeses such as brie and soft curd cheese and cheese in water(ricotta, feta, etc.) are not."
So, looks like you will have to limit yourself to hard cheese. And those delicious dried, peppered sausages they sell? Forget about it...