When buying makeup, stop wasting money on useless stuff. Find out what works for you and keep doing it. Don't shop on impulse. Only get things you need. Nobody needs eleven eye shadows. Don't let sales clerks talk you into bad bargains. Have a free makeover if they offer one. Think it over well before buying. Come back the next day. Also practice how to say: "No thank you, I don't need that." Remember that you have no obligation to buy anything. You owe it to yourself not to spend money on unnecessary things.