Tanking, need some advice?

[Kyana]

Aggro/Hate:
It's not just your job to manage hate.
Especially at lower levels you lack a number of skills to establish solid hate on all mobs you're tanking.
DDs should wait a few seconds before going all out, healers can't do much if they have to heal you to prevent you from dying.
If they draw hate for that you probably took on too many mobs at once.
As GLD/PLD you'll always have a harder time holding hate of a bunch of mobs compared to MRD/WAR.
Never use Provoke to pull and always use a enmity generating attack after Provoke.

So, for your list:

- Getting over the DPS rushing ahead: You can't (well, you can if you feel like it). If they can't wait, let them die. *see above*

- Getting more self-assured: If you know the dungeon/fight in and out, you will be prepared for any situation. You know what to expect and how to handle it. Experience is king.
EDIT: The sad thing is that people expect tanks to know everything. They think as soon as you hit 50 you know how to do all endgame content.
Your best bet for harder content is to join training parties or make your own to get a feeling for it.

- Building enmity as quickly as possible: As you level up you will get more tools to work with and to make your life easier. For GLD/PLD there's only Flash/Circle of Scorn and splitting up combo to maintain hate on multiple mobs, and for quick hate you should use your combo and add your instant skills in between, then keep going with hate combo.

- Good low-mid-level combo strategies: Not sure what you mean. There is no strategy. Either use hate combo on single target or split up between multiple targets, according to enmity level, with added Flash as needed.

- Methods for marking (who first, etc): Healers -> DDs/mobs with annoying AoE or strong attacks -> Tanks, but it all depends on the situation.