Fish is poached in a flavored liquid called a court bouillon. Just about any aromatic herb or vegetable can be used in the poaching liquid. There is one rule for poaching and that is not let the water boil. The liquid should be barely simmering. If the water boils the outside of the fish will overcook quickly.
Here is a list of quick tips:
* Make sure that the butter is extra hot but not yet burning.
* You can buy grill baskets made for grilling seafood - these help small pieces of fish from falling through the grill, and will help in grilling delicate fillets.
* Washing of the hands before touching the fish is important.