Something I was always conscious of was that there were two peaks in FJ accident rates, one at 400hrs on type and another at around 2000 hrs. The former likely due to pushing the boundaries a bit too much, and the latter was very likely due to your point, thing.
I've always tried to:
1) encourage challenging questions from subordinates/students
2) put myself up for review by my subordinates/students
Initially, it can be a little painful, but it does stop one from becoming complacent. Oddly enough, after a bit, it seems to impress them even more. One makes mistakes, but then self-corrects them before they become serious, and it's recognition and recovery which seems to impress the most.