Best way to make money is by doing quests which can be found at /warp quests. You can load all the quests at once and they are all repeatable. /warp quests journal will help you keep track of what you need to do next for each quest you have selected.
You can also join a /job or list items on the auction house.
Alternativley, set up shops (you can pay for a warp)
To set up a shop:
hold item you wish to sell and left click chest. Enter in chat how much you want to sell ONE item for then stock the chest.
/qs buy changes shop to buying from players.
/qs price (amount) to change the price of items
/qs remove to delete the shop