Spend some time Getting a feel for her W damage. How much it takes from a Hp bar. Remember you can Trigger W with E. some times you can snag a kill with auto Q auto E. Or just win a trade vs some one. Bit pricy in your MP early to do this thou.
Get used to her E, how far it moves people and how wide it counts terrain as a stun.
Get used to the Range of Q. Try to roll diagonally away from skillshots when jukeing CC. Its harder to hit a Target moveing 2 directions with a linear skillshot.
Also get used to autoing after using Q to give you a faster CD. Sometimes you might need to roll back auto a minion as your retreating to get the next Q you need to live.
Don't Randomly Pop R. Use it when a lot of CC is down or you need the Stealth to survive.
Get good at Q repositions to set up E. This can be the difference between stunning some one or not.