Before, I was aiming for "everything right" and was ending up feeling like I'd failed. Now, my goals are smaller and more focused, so I finish practice feeling like I've succeeded at everything I set out to do. And that feeling leaves me trusting that eventually I'll get damn good at this violin thing.
If you "woodshed" with intention, curiosity and attention to the kinesthetic experience, you will not be bored and you will be in learning mode. Making a quick Practice Plan -- different every day -- can help you slow down and connect with whatever you're working on. Setting intentions like these can be a useful mental warmup, before you start your physical warmup. Try it!