At the main menu, press Shift+Alt+A to enable cheat mode. 
During gameplay you can now use the following codes: 
Alt+K = Building is free, no resources are required
Alt+C = Access to all missions at campaign selection screen
Alt+X = Add 1000 gold and set popularity to 100 

Stopping Bear Attacks:
When you see a bear appear or hear of one attacking, just build a wooden wall 
around it and soon it will die. Or you can send your Archers to kill it, which 
is a quick way of stopping bears and gaining popularity. 

Destroying the Enemy quickly:
In order to destroy your enemy, place as many Archers as you can on the wall 
facing the sign post. A small number of Archers can take out a reasonable size 
army.