1. Putting concealer on first
I used to think this was the right way to do it too, but it is a waste. When you put foundation on top of it, it all just slides around and makes you add more on top of that. Try color correcters underneath your foundation, then foundation, then concealer.
2. Not using a primer
If you have oily skin, mattifying primers are a must. Also, try a makeup setting spray as a primer or transulsent powder. It is AMAZING. If you have dry/combo skin, use a perfecting primer to give your foundation something to stick to and keep you from becoming blotchy.
3. Completely filling in your eyebrows
4. Not bringing foundation/bronzer down your neck
5. Lining your lips after your lipstick
Don’t get me wrong, sometimes this looks really nice. But most of the time it’s much better to like your lips first, then apply your lipstick. Also, fill in your lips with the liner. If not, liners are more potent than lipsticks, when the lipstick wears off you’ll have a big thick ring around your lips where your liner is staying strong.