Only Pay Half the bills!
When you get the bills, take them inside and don't pay them until there 
are more in the mailbox and the ones in the mailbox should disappear 
when you pay the first ones.

See your player naked!
While they are in the shower, go to buy mode. Hold CTRL+ALT+SHIFT+C 
and type: move_objects on. Then move the shower while they are in it.

 

Get rid of maid!
After you hire a maid and she is at your house, go to build mode and put 
walls around her so she can't get out. Just leave her there and she will 
eventually disappear! try doing it with the gardener, too.

 

Make anyone swim through the ground:
Make sure you have a swimming pool!
Pause the game and press CTRL+ALT+SHIFT+C 
type: 
move_objects on
and pick up any person and put them in the swimming pool.
When you resume the game the person with go back to where they were, 
but will be swimming through the ground.

 

Refill mood
First put the 'move_objects on' cheat on, then save game. Go to buy 
mode, select your sim and delete them. Go on to live mode and click on 
their face on the control panel.

 

Sims can buy a desk, computer and chair. Use them to get a job (there 
are more available than just the ones in the newspaper) and then sell 
back the items right away. As long as it is on the same day the Sim 
bought the items, they will get all of the money back.

To get the cheats to work type CTRL+ALT+SHIFT+C then type them
 
KLAPAUCIUS         : Gives you 1000 Simoleons
WATER_TOOL         : Puts water around your home
SET_HOUR           : (Values 1-24)
SET_SPEED          : (Values -1000 - +1000 )
INTERESTS          : Lets you change personalitys & interests
AUTONOMY           : (Values 0-100)How much Sims think on own
GROW_GRASS         : (VALUES 0-150)
MAP_EDIT ON        : Edit Maps on
MAP_EDIT OFF       : Edit Maps on
ROUTE_BALLOONS ON  : Self explainitory
ROUTE_BALLOONS OFF : Self explainitory
!                  : Repeats last cheat code entered