Grease it with soft butter, not melted. This is the single most important thing: soft butter clings to the wall and reaches every crevice. Melted butter slides off, pools at the bottom and leaves the relief bare.
Then dust with flour, especially over the relief. The non-stick coating helps, but on a patterned tin this is what makes sure the cake comes out whole.
Fill it two-thirds at most: the batter rises. Let it cool 10 to 15 minutes before turning it out; hot it breaks, cold it sticks.
Oven safe. Not for induction, direct flame or the dishwasher.