Patrick Flanigan, shotgun exhibition shooter, had this to say about practicing.

Just Go Practice?

One of the worst tips for a shooter to give is to blindly tell someone to just practice. If you’re going to give advice don’t just walk off and say “well, go practice.” For a new or even veteran shooter to just go out and practice what they’re already doing wrong is going to make the issue worse. If he or she has bad form, how do they know? They will go up, continue to practice, thinking they’re going to get better, but not knowing that they are compounding the problem. Tell the person what they need to change or do differently. You need to insert more specifics. That word practice is a great word, but first identify what needs to be practiced.