I think there comes a time when all that practicing does is harden bad habits, build up nervousness, and overall doesn't help the performer. Don't get me wrong, you have to have the routines down for a successful show, but you also just have to suck it up and go on with the show, regardless of if you MIGHT mess up or not.
Practice is only good to a certain extent, then it's just bad IMO. Right now, I'm working on a coin routine of mine for Red Robin. I've been looking over coin magic a lot lately for some openers, but haven't found much that suits my style, angles, quickness, or just me.
I thought about Silver Dream, 3Fry, 3Fly, etc. Just nothing that really suits me. So these past few weeks I've been working on a 2 coin routine that also involves a nice story to it. That part, the patter, is CRUCIAL to my style. But then again, I'm not very creative. I only have 2 routines now that I personally came up with...but both are staples in my show. What I'm saying though, is that right now I'm practicing this coin routine...but come this Friday, I'm gonna through it in the show and see how it plays. I'm sure I'll mess up a few times, that's life. But, after I mess up enough, I'll start to learn what NOT to do, and how to change it....ahh, the benefit of workshopping a new routine. Both good and bad. LOL!
Best.
Steve