Quality over quantity

I was slighly concerned about the amount of time I could commit to my golf practice, and expressed my concerns to my instructor. He suggested that quality of practice is much more important than quanity - he put it like this - during a game, you only have one shot to hit the ball the way you want. He told me to take this same approach to practice. Identify a specific target and hit each practice shot with the same concentration given on the golf course. Go through the same pre-shot routine you use when you play. Hit and evaluate each practice shot with the same effort. Apparantly you will improve a lot more quickly when you practice in this way....
I hope this helps those with less time to dedicate to learning!