John Q. Mayhem
Explorer
Here's an interesting trick: Take the Goad feat from Races of Stone/Complete Adventurer. It requires BAB +1 and Cha 13. You can take a move action to force an enemy to make a Cha-based Will save or not be able to make melee attacks against anyone but you on its turn. Use it, then ready an action to attack it if it comes near you. If you use a reach weapon, you'll get an AoO, too; if you have the Stand Still feat from the XPH, you can try to stop it in its tracks, too. Only works against melee-focused enemies, of course, but they tend to have bad Will saves, anyways.
The Kiai Shout feats from Complete Warrior look like fun.
The Kiai Shout feats from Complete Warrior look like fun.