There are many types of way to make money.
If you have the patience I would farm repeatable quest items and sell them, or collect stacks of lost powers.
If you feel like leveling at the same time...collect and stack quests like...
1. Hunting REPs [from master hunters in Kaslow, Ilya, or Jale]
2. Guild REPs [from guild representatives in Kaslow, Ilya, or Jale]
3. Regular Quests
4. Quill Books [bought from quill merchants in Kaslow, Ilya, or Jale]
If you stack all, then repeat some, you'll get lots of gold in no time.