1) Farm your materials so that overhead cost is as low as possible
2) Craft items several levels below your current level that you can HQ as close to 100% of the time from NQ mats.
HQ from NQ mats is the most crucial thing.

3) Buy a trash gear set for your dungeon runs to equip when fighting trash mobs. You can switch back to the main gear for bosses.
Spiritbond to make materia and sell on markets.