>Does anyone have any tips on buying/cooking shrimp and/or shellfish?

my favorite thing to do with shrimp is to make scampi.
take about a pound of shrimp, shelled and deveined.
marinate the shrimp all afternoon in a big bowl of:
1/2 to 1 cup olive oil
1/4 cup lemon juice
1/2 tsp salt
1/4 tsp pepper
4 garlic cloves, peeled and mashed
1/2 tsp oregano
(vary the spices to your taste)
then you can either broil the shrimp or panfry them.

JoAnn.