Well, I have found a farmer around Goldshire.
Which like to trade a apple and 19 exp for a refreshing spring water
So this wat you have to do:
First get allot of refreshing spring water from a bartender.
(Which is only 25 copper each)
Then talk to the farmer near goldshire.
He will ask for a trade.
Press accept and then you got the apple and 19 exp.
Then do it a several time until leveled up.

Usefull for level 0-3

by the time u find that guy you'll be lvl 5, hardly an exploit...