Step 1: Remember at the beginning of the game to use the waaagh if opportunity arises (it's not amazing but when used it's hard to say it can't help).
Step 2: Charge with the Warboss general (turn 2 or 3)
Step 3: ???
Step 4: Remember on turn 5 you could have waaaghed (but you excuse it realizing it wouldn't have helped when you got massacred or slaughtered the opponent).