I have noticed that most of the cheats websites are suggesting really drawn out routes to enabling the cheats, this is not necessary! Follow the instructions below to enhance your game play:

During game play press [ctrl]+[shift]+C to open the cheat console, this will appear at the very top of your screen, then just type any of the following codes: (Hint: You will need to press [ctrl]+[shift]+C each time you enter a code)

help - Display most cheats
Kaching - 1,000 more Simoleons
Motherlode - 50,000 more Simoleons
shazaam - +2,500 lifetime happiness points to active Sim
freerealestate - Ignore the cost when buying a lot
modify traits - Set or clear traits
add to household – Add active Sim to current household
set age [number] - Set age of the Sim
edit in cas – Take the Sim back to Create-a-Sim
set career [career/level] – Give selected Sim a career
force opportunity – Click career building you work at to force an opportunity
force event – Click career building you work at to force an event
force all events – Click career building to display all events for the career consecutively
force service sim [name] – Force a specific service Sim to appear
force visitor - Forces a neighbor to show up
make me know everyone – Selected Sim knows every other Sim
make friends for me – Make several random friends for selected Sim
make happy – Sets all mood/moodlets for everyone in the house to perfect; removes negative moodlets
make motives [static or dynamic] – Set motives static or dynamic for entire household
unlockOutfits [on or off] – View career outfits and service uniforms [Note 1]
moveObjects [on or off] – No limitations for placing/moving objects
resetSim [first name] [last name] - Return Sims to safe and neutral state at home
constrainFloorElevation [true or false] - Force terrain adjustments regardless of objects, Sims, and other structures
disableSnappingToSlotsOnAlt [on or off] – Objects will not snap to slots while holding [Alt]
fadeObjects [on or off] – Objects fade when camera gets close to them
snapObjectsToAngle [true or false] – Toggle 45 degree angle object snap
snapObjectsToGrid [true or false] - Toggle snap to grid for placed objects
hideHeadlineEffects [on or off] – Show talk/thought balloons above Sim’s head
jokePlease - Print random joke to console
enablellamas [on or off] – Llamas enabled message
slowMotionViz: [0-8] – Slow motion visuals; 0 is normal, 8 is slowest
testingCheatsenabled [true or false] – Enable testing cheats [Note 2]
fps [on or off] – Toggle framerate display at top right
fullscreen [on or off] – Full screen
quit - Quit the game

Please note that some of these cheats may not work! I’ve tried the most useful ones but some may have slipped through my fingers sorry about that guys!

Happy gaming!

Read my review and watch video about the Sims 3.