Setting realistic goals for music study? Great idea. Not thought about it? Why not? One of the best reasons is that it gives you a track to run on. One of the best warnings on goal setting? "You can't ride more than one horse at a time"
Here are a few additional thoughts.
Here is a personal example. I study jazz drumming. I'm planning on attending a jazz camp for adults next summer. When I arrive there I will have to audition for placement. I want to place as high as possible. :-)
Goal: Recreational player
Strategy: Two hours of playing and practice a week
Tactics: Ditch the TV and web surfing by 2 hours. Tell your kids to go outside and play. Give a list of pieces to your teacher you would like to learn.
You've got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail.
I'm a professional pianist and music educator in West Toronto Ontario. I'm also a devoted student and teacher of the drums.