When searing anything you really need to first of all avoid nonstick pans and use either cast iron, stainless steel, Dutch oven etc anything that retains and conducts heat well. If you add too much oil you won't get a good sear either, you only need like a teaspoon or so for a steak, piece of chicken, and a tablespoon for larger items. Third make sure you heat the pan/oil till it smokes before you add the meat. Making sure your food is dry is also essential, and adding salt to the surface will help with the maillard reaction. Hope this helps :)