What's this about? A simple rules tweak: running active defenses without the defender knowing the TH roll results in advance – a piece of information that, in many cases, the defending character could not reasonably know. It's a GURPS article, but could apply to any game system that runs defense rolls in the same way.
I've been a vocal (if not quite proselytizing) proponent of the proposal below; I'll daringly call it "the biggest pro-realism, pro-roleplaying bang you can get from a zero-bookkeeping, zero-extra-rolls, zero-effort rules tweak". Read more...