hmmm, been a while since i was that low, but i'll give it a shot ^^; In the dunes, what i did (Elvaan PLD mind you) is every 3rd hit of the mob (ie: iwas almost spamming it on myself) i would use a Cure 1 spell on myself. with the small damage, and provoke and the constant 28-30 hp from cures I don't recall loosing hate to anyone around that level. As long as the WHM in the party isn't spamming onyou as well, you should be ok. Your also a Taru, so tech. you'll take more damage than i did, but have a greater MP pool... So Like someone said before, Pineapple juices are your friend. Also, the update about resting and not loosing TP is extremely nice as well (it wasn't there back then ;_; ). Anyways, Pineapple juices, consistent curing yourself, and provoking every 30 seconds will hold hate fine until 37 and flash. Try to time out your JA's (other than provoke and defender) so they go off at more of a % (ie: if you have Shield Bash, Sentential, Rampart, Warcry, they are all 5 min recast, so fire them off roughly every min or so). I never really had a problem with hate at that level, until my static starting fighting in KRT with our monk going All out damage -_- Monk + BS gear + x2 Damage on bones = Cover being the MNK's new best friend. ^^;
Remember, being a good PLD isn't just holding hate, it's knowing the balance... A good DD will try to stay under that balance.
also, gridlocking hate isn't always a great thing against some mobs... If you can't loose hate when it counts and cure yourself up to near full... (you'll get hate back

not 'that' hard

) you'll be doing the party less good as a skid mark on the ground because more than likely, they will be following. ^^;
edit: ----
oh! just noticed what Celvantes said about 1 or 2 cures = a voke. That is and isn't true. Remember just the cure spell alone isn't hate building... it's how much HP you actually cure, which is why everyone says spot heal the others in the group if the main healer is cure bombing you
Back up healing is good for some decent hate especially post 30 if you have a thf. for example. WAR THF and PLD set up.
THF pulls, and brings to camp (say mob gets a hit in on way), Throw out a cure 1 or 2, then by time for the SATA, WAR may have taken a hit or two, While They are SATAing, throw out another cure on WAR. Then the SATA is fired off, and you voke/flash etc. This does alot in terms of hate. the 2 cures you do almost equal a voke at that level. Also, this allows your WHM to rest a slight bit longer if needed, gives you an early edge in focusing hate, and so on...
These are all tricks and things i've done and worked well for me ^^; so don't take this as 'law'...
Also, to add to that list of static armors and such, is the Durandel. Same as the Gluttony sword with none of the bad sides, and a +1 to your growing hate pool.
Not sure if mentioned, but a good shield is always nice. with all the updates, a smaller shield may work out better than a larger shield, since block rate is usually > than % at the lower levels. Kite shield and Aegis being the two larger shields with the best balance of both.
So yep, there is my input ^^ and happy tanking!