One issue that I run into a lot is barre passages that exhaust the hand—making it difficult to really get them practiced properly. Here’s a little video I put together about how you can kill three birds with one practice session:
1. Learn this kind of passage really, really, really thoroughly while….
2. keeping your hand from getting exhausted, and …
3. training your hand to relax whenever it needs to relax.
I find this same technique of practicing applies to most really difficult passages where my hand tends to hang onto tension and get tired.