It’s a good question, I’m a novice still but here are some links with good free advice I've used…
https://www.vanishingincmagic.com/magic-tricks/articles/how-to-practice-magic-tricks/
This is an interesting topic. The title alone communicates a lot. Three different contexts and yet they sound the same, However, they each mean three different things. Practice This is all about learning, collecting information, testing, refining and adjusting. This can take months of study and...
www.michaelvincentmagic.com
Jason Ladanye explains how he practices more efficiently. Learn how to manage your practice and make it more fun.
cardmagicbyjason.com
There are other blog type posts from well known performers too, I just listed a few I like, your mileage may vary. I really like Michael Vincent’s take on
wanting to practice and the stages he goes thru. I personally have been following something close to his structure in that link. I think he has a great mindset about this stuff. I like Ladanye’s advice for setting up an area to practice, Giobbi has similar advice…McBride too…I might be mixing up the source but one of those guys puts pictures of faces in his practice area so he gets used to making eye contact with the audience.
I start with learning the mechanics of a trick or routine from point A to B. I usually don’t just practice a move without putting it in context, intent matters. I will break things down to manageable portions though.
Once I get thru the mechanics of it then I start to develop a script and the finer logistics; my posture and motions… blocking for myself and props (cards coins etc), so does contingency plans for areas that can mess up get addressed too….I’ve been trying to minimize these areas lately but they still exist.
Then I apply what I’m practicing to a participant (perform), note any adjustments needed… wash rinse repeat.
I think that’s the part I needed to just do to advance…Perform! Mr. Vincent’s point on this I think is really great. My cut and restored string changed quite a bit after a just a few performances. The subtleties I missed during the first rounds of practice have been incorporated into the following rehearsals. Now I’m getting better interactions and reactions with that trick since I addressed the issues that cropped up in people minds when I first started performing it.
Card College has good advice strewn throughout the volumes, Giobbi has good practice advice I think that can be applied to not just cards.