Being agreesive with your timers(provoke/flash/warcry/etc) and macroing any enmity(haste for flash if any) will give you a good amount of hate to work with.
I use to make a macro for each member of my pt, for curing. That way any one pulling hate I would give them a cure. Jobs that I deemed would pull the most hate if any, I would make a 2nd macro cure for them with a higher tier. Macroing the spells for me made it easier to just press the macro and then focus on other things rather than scrolling through spells and targeting around etc.
Knowing when to use your hate tools is also something to work on. If you lose hate when the mobs about to die, you dont need to provoke it or anything as the next pull, you might not have it ready to start the fight with a hefty spike hate.
Bring meds whenever possible, juices,refresh types, anything that helps you with MP management til you can recieve refresh(even then I still bring them for back up) can help. Ailment items work well too like antidotes. A lot of the juice mats are relatively cheap to get or farm for. Ive seen a lot of plds craft them while waiting for gather or if resting during pulls,afks etc. Youd be surprised how often I didnt get refreshed....with a rdm. Or if you are unlucky and only whm, juices help.
Small stuff like this will help strengthen your hate. This is w/o calculating any damage potential you are trying to achieve, remember a PLDs job is to tank, but you can tank and add damage w/o sacrifing anything needed to tank(reduce damage).
WHM/BRD: Triangulum PLD MNK SAM BLM DRK