Hidden items:
In Miridan's Pass, you may encounter some "pirates" that shout "Run away!". Follow them and they will lead you to a cave just behind the cute creature where some nice items are located.

Arrow heads:
In an optional quest, you have to find arrow heads in Hopiris. As soon as you get off the talking boat, turn to your right. They are at the foot of the first pillar.

Lab machine codes
In munari city, enter the university and arena district and go to the lab. There you will find five machines that are not working. you must enter these button codes to activate them.

Increases some of your stats and activates the machine
Etheral stabilizer: X,B,Y,A.

Increases some of your stats and activates the machine
Etheral condinser:A,X,A,Y.

Increases some of your stats and activates the machine
Wave study:B,B,X,A.

Increases some of your stats and activates the machine
Etheral buoyancy:Y,B,X,B.

Increases some of your stats and activates the machine
Moto perpetua:Y,A,B,Y.

The White Lady statue:
After you beat the Sepulchre, you can enter a place called Miridian's Pass. Once inside the area, follow the right wall. You will find a trail that leads up into the mountains to a statue called "The White Lady". Equip Sangaril with a crossbow and enter first person view. Aim at the colored gongs in a specific order to raise the bridge up to the statue. Once you get there, you will get 15000 experience points. Shoot the gongs in the following order.

First bridge: Red, Yellow, Blue
Second bridge: Orange, Green, Yellow, Red
Third bridge: Blue, Orange, Red, Yellow, and Green

Easy gold:
In Mas Ora's district of The Munari City, go to the House of Soleil. It is the first building on your left after entering Mas Ora's district. There will be a human standing directly in front of you, asking for a loan of 1000 gold. Give him the loan and he will give you a Bodril. Keep it and later in the game he will offer to pay you back. Instead, tell him that you want to buy the Bodril for 5,000 gold. After this he will ask if you actually want to buy it. Answer "No". You will gain a little bit of experience and 1200 gold. Do not leave. Continue talking to him. He will keep asking if you want to buy his Bodril. Keep answering "No" and he will give you 1200 gold each time. Repeat these steps to get as much gold as needed. However, once you leave the area, he disappears and you cannot do it again.

To increase your skill and get money at the same time, go to the arena in Munari city and play "Survival". You have to pay 1,000 gold, but you can get 5,000 back, depending on how far you get. You also get experience points for killing the monsters.

Back Stab trick
Back stab does alot of damage from behind in battle, but instantly kills enemies when they are suprised attacked. Also though, when an enemy is sleep, frozen, or paralyzed, they are considered "suprised" when attacked. A very cheap trick is to put any of those 3 status effects on the enemy and then backstab them for an instant kill. This trick allows you to easily reach waves in the triple digits in survial mode at the arena...and actually be able to defeat them at the same time.