I never use cheats except for modding and you will find you enjoy the game more without them, but as a resource I have included them here nevertheless. Not all of these work with the demo, you need the full version for some of the more potent ones.
CNTRL + click
Use this in map mode to teleprt across the map
CNTRL + F4
Deals a Random large hit to one enemy on the map.
CNTRL + Shift + F4
Deals a Random large hit to all enemy units on the map. (Will sometimes crash your games..)
CNTRL + F5
In battles, puts the AI in charge of your character
CNTRL + F3
Deals a MASSIVE hit to... yourself. Suicide! :zegun:
CNTRL + X
In the inventory, this give 1000gp
In the party screen, select a troop and this gives it 1000 XP
In the character screen for you or a companion, this gives the character 1000 XP
CTRL+W
In the character screen this adds 10 weapon points.
CTRL+F9
Battle becomes slow motion.