Here is a great article on slow practice from The Bulletproof Musician:
"(Philadelphia Orchestra concertmaster David Kim) revealed that one of the keys to his success (and building confidence as well) is super slow practice. A process of practicing in slow motion – while being fully mindful, highly engaged, and thinking deeply in real-time about what he is doing."
Am I being mindful?
Am I highly engaged?
Am I thinking deeply in real-time?
Those are perfect questions to post on your music stand as a constant reminder.