Watch how great people practice, not just how they perform. The practice is the part you can copy.

Performance is the part that gets filmed, and it is the part you cannot copy, because it is the output of a thousand hours you did not see. Practice is the copyable part. How they warm up, what they repeat, how they handle the rep that goes wrong, how slowly they work on the thing that is not yet automatic. That is the actual recipe, and it is usually much less glamorous than the highlight.

Find footage or an account of someone good practicing, in whatever you care about. Steal one habit from it this week, not the style but the routine.