By the heaviest pans possible. An absolute must with a million and a half uses. But do not buy just any plastic wrap. Go to a restaurant supply store and buy a large roll of restaurant plastic wrap. It sticks much better than the common grocery store plastic wrap and is much cheaper per foot.
Experience is crucial to being a great cook.
Having the right tools at your disposal is important, but practice, practice and more practice will make the well seasoned cook. Get credible information from real chefs and their purveyors, ask questions on our chat room, and see where chefs dine and what they are cooking.