First and most important buy an oyster shucking knife. We have heard of more people using every utensil known, other then the knife designed for the job. Not that using an oyster knife will keep you from getting injured, its just that it will do a better job then most other instruments, as it was designed with an oyster shell in mind.
Step 1: In the hand that is holding the oyster, drape a towel or put on an oven mitt. Hold the oyster firmly in that hand, the knife in the other. Slip the knife blade between the top and bottom shell right by the hinge on the back. Be aware that the ridges on the shell are very sharp and can cause harm as well.
Step 2: Run the knife all the way around the oyster until you get to the other side. This is where you need to put some muscle into it, but be careful – this is the point where most injuries occur.
Step 3: Using a twisting motion, pry the top and bottom shells apart. Be gentle but have a firm grip so you won’t lose any of the liquor inside.
Step 4: Cut the oyster free from the shell. It will be connected by a tough muscle on the underside, slide your knife under, and sever it. Now your oyster is free from it’s shell and ready to be eaten