Try to gain high experience for gaining levels quickly. Remember, some items are cheap at the start of the game, but will become expensive when you gain levels.
Good character
Choose the Childman at the selection screen, and make him a mage. Then get the Titanium armor and the Mace as a weapon.
High level Culture Stock
Gain a lot of money at the start and buy Culture Stock before you go to an Inn. Culture stock is cheap at the beginning of the game and gets more expensive when you gain levels.
Potions
The potions add six to one stat and take three from another. There are six potions and six different stats.
Regaining HP
The more Rings Of Regeneration you have, the faster your HP will be restored.
Gaining experience...