Might seem like an obvious one, but have all players right down their attack bonuses, damage bonuses, AND SKILL BONUSES!!
My group wastes a lot of time with people doing math. Some of it is that not everyone is good at math, and that's fine. Some of it is that people continuous do math on numbers they could just have written down.
My group wastes a lot of time with people doing math. Some of it is that not everyone is good at math, and that's fine. Some of it is that people continuous do math on numbers they could just have written down.