The majority of loot you receive comes in the form of items,of course you have limited capacity,so the answer is -loot bags-.
you can make unlimited sized loot bags,and if you can get them to your depo you can sell items to the store,you will see that you can make a good amount of money in a very short time.
Of course you should not try this in Thais or Carlin,there are many low levels in the depos who will take your bag from you if they see what you are doing.
If you are a low level character i suggest you might want to station another character near by,so you can hunt,then transfer the loot to your empty capacity character.
The biggest mistake i see are people standing in the depo trying to sell items to other people,if you have something you need to sell you should just yell to broadcast your item once or twice,then continue hunting.standing in the depo all day is a waste of time.
Another mistake is trying to kill monsters that are too strong for you,most likely you will not get a good item from killing a hard monster once or twice,you will find the easiest treasures from monsters you can hunt for long periods of time.
You should find monsters that are easy for you and collect treasure that you can sell to stores.
Click on the NPC link to give you a basic idea of sell prices and places.
