Pick up every treasure chest item(s) and death monster items. Also need leveling
quick? Move to another map and directly return back so you can fight the same 
monsters again. Also if you find items wich you dont need. Sell. Also use the inn
sleeping methode for quick healing. If your in a city and never sell food. These
are handy if your not in a town and need mp and hp. Also talk to everyone for info
or a side quest. Sidequests give gold and items i not. Then you just helped them. 
I know a sidequest if your in a town and someone is talking about a clockmaker 
which died and someone toke over town and she wants the deed. Go into the house
and pick up the key. Then go to the clock.