I tie provoke to a "/targetenemy <t>" to ensure that I'm locked on provoked target. This prevents me from accidentally using my follow-up enmity skill on a wrong target and lose aggro on the newly provoked target.

I also do a count down timer for Holmgang to remind healers that they can ignore me for about one GCD.

I also have a macro asking the team to focus attack on a target. Especially useful in DFs or raids with DPS races.