You might want to look at her room environment, some babies need a dark room or anything will catch their attention and they will focus on it.
Shielding her eyes with your hand also helps with this.
I would pat and shush her on your shoulder first, to get her drowsy, and then lie her down, keeping with patting and shushing. In Tracy's sleep interview, she talks about this. The sleep interview is attached to this board, as an announcement.
Definately keep her awake times short, especially for a newborn. If her feed time is close to her sleep time, that's okay, just make sure that she isn't lying completley flat on her back-- Tracy has always recommended raising the crib mattress slightly at the end where her head would lie. This aids digestion. It could also be that waiting till the first yawn is too late, try 15min early, newborns get overtired (which makes the short naps worse) in the blink of an eye.
You have found a wonderful place for support, WELCOME!