There's some synergy in Tome of Battle with the Instant Clarity feat and a particular maneuver but I can't recall which one. I think I'm on the wrong track though, I think you expend your psionic focus to take a 15 on one of the Concentration-check-in-place-of-a-save maneuvers and then regain it immediately, which is not what you asked for. I could be wrong though, there are so many tricks that it's easy for me to forget most of them.