The Pilot Light
Practice soft playing. I mean, really soft playing. Challenge yourself to play at that uncomfortable dynamic where some notes might not speak.
For some reason, this reminds of me of a pilot light on a gas burner. Either the image works for you or it doesn't.
In case this analogy isn't obvious: people tend to turn off their brains during long notes. Fill your head with something useful.
Like subdivisions, perhaps.
Piano reductions of.....Piano Parts?
For all of you poor souls who wanted to perform the Hindemith Sonata but only had one pianist in the school even willing to consider playing it (and he/she is booked). Or the Casterede Sonatine, or the Sulek Sonata "Vox Gabrieli," or....
What if publishers came out with simplified piano parts for some of these pieces?
Crazy idea? Stupid? Impure?