2. Not taking off your eye makeup at night. Think about it: you wouldn’t want to go to sleep with your face covered in dirt, right? Of course not, so why would you sleep in your makeup? I’m as guilty of doing this every so often as much as the next girl, but it leaves you with dry, blotchy skin, and can even dry out your eyelashes. Don’t risk your young-looking skin just to save 30 seconds of your bedtime routine. It’s not worth it at all.