#1 Compliments about her intelligence. As much as girls like to be told they’re pretty, calling her smart is a much more effective way to make her feel good. If she’s beautiful, she’s probably always complimented on her looks. But what about her brains? Just because she’s pretty doesn’t mean she’s not smart.
If you know her and want to make her feel incredible, tell her you like the way she thinks. Tell her you love how smart she is and how she thinks things through. It’ll mean more to her than you know.