Getting my baby to sleep through the night advice

Okay ladies, I know I'm being a tad selfish with how amazing my baby is doing for only 6 weeks old but I have started a bedtime routine already to help her get to sleep and have a schedule. I feed her an extra ounce at bedtime to get her to sleep longer stretches. So by 8-8:15 she is asleep and waking at 2-2:30. Then again at 7. Im trying to find a way to avoid that one middle wake up. Any suggestions?