1. Cosmetic salespeople are there to sell make up. More is more to a saleswoman. Be skeptical about what you`re advised.
Do you really need four eye shadows?
Will you actually wear the lipstick color she's pushing?
Before taking anyone's advice, look at their make up, Do you want to look like that?...
2. You are the customer. When buying make up, salespeople are working for you. They have testers to try things and love giving demonstrations, so ask for one. Don't feel like you're putting them out, That's what they're there for.
3. You don't always get what you pay for. If you like a color or how something feels on the skin, It doesn't matter if you paid $2 or $18 for it.
4. Cosmetics are meant for faces, not hands. You don't wear it on your hand, So why test it there?
Only in it's context can you tell if something works. Before shopping, arm yourself with moist towelettes to wipe tester. You can also just tissue off enough product until it's safe. Then put make up on where it was designed to go.
5. Impulse shopping doesn't pay. Spend some time with a product or color before buying it. Test it on the face and take a walk so you can see it in a more natural light ( as opposed to a fluorescent one.) Don't worry, you'll go back if you want it. Yes, this kind of shopping is a pain, but aren't you tired of having a drawer full of expensive mistakes?...