2. Buying the wrong pans
It might be convenient to buy a boxed set of pans for your kitchen, but according to Dooher, this is another common cooking mistake. Her advice is to avoid the pre-fab set—many pieces of which you won’t use regularly—and instead build your own custom collection. Choose individual pans that are suited to your personal cooking needs, and make sure they’re made from either heavy-duty stainless steel or cast iron: both materials are incredibly durable and retain and conduct heat well.