One issue with this is that different judges see different things, so she may do a routine that you and she feel is cleaner or "better" than one she did at a meet two weeks ago, and the judges at this meet may be tougher than the judges at the last meet and score it lower. No need to feel bad that the score is lower if the gymnastics were better.
With Short Stack (L5), I ask her, on the way to the meet, what her goal is on each event, and she knows that I am in NO WAY looking for a goal regarding score or podium placements. She usually picks goals that are associated with what she's been focusing on in practice. Yesterday it was to block on vault, connect both halves of bars, land her BWO on beam, and to land her back tuck with a good body position on floor.
Similar to other parents, the last things said before I hand her off to coaches at a meet:
Me: Hey Short Stack! What are the most important things?
Short Stack: Work hard and have fun.
Me: That's right. Love you! *hug*