Cheats and Hints
Cheat mode:
Press [Ctrl] + [Shift] + C during game play to display a prompt in the upper left corner of the screen. Enter one of the following codes to activate the corresponding cheat function. Note: Enter [Exclamation point] at the prompt to repeat the last cheat entered. Enter a [Semi-colon] between codes to enter multiple codes at the same time. Additionally, most of the codes will only work with the unpatched version of the game.
Result Code:
1000 Simoleons (unpatched game version)                                                      klapaucius
1000 Simoleons (patched game version)                                                          rosebud 
Add new family history stat to the current family                                             hist_add
Architecture tools automatically set the level as needed                                      auto_level
Automatically load indicated house, no questions asked  house                           <house number>
Check and fix required lot objects                                                                   prepare_lot
Map editor disabled                                                                                       map_edit off 
Map editor enabled                                                                                        map_edit on 
Move any object                                                                                           move_objects on
Display personality and interests                                                                     interests
Make grass greener                                                                                       grow_grass 150
Quick money:
Enable cheat mode and enter the klapaucius or rosebud code. Display the cheat prompt again and type !;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!;!:!;! (up to sixty total commands may be entered).

Buying multiple items:
When you are buying chairs or other items that you require multiple numbers of, hold [Shift] to repeatedly place the item where desired without having to re-select it.

Hint: Cheaper wallpaper and floors:
Get money for old wallpaper before you paste new wallpaper in a room. Sell the old wallpaper, then paste the new. This also works on floors.

Hint: Pond:
If you want to put a pond around your house, enable the water_tool code and get the pond tool.

Hint: Easier relationships:
Create a family with a male and female adult that are of the same category (such as Virgo and Virgo) and move them into a house (or created house). Immediately after selecting live mode make them kiss approximately ten times in a row to set their relationship meter to be 100. If you continue kissing the female should ask to have a baby.

Hint: Selling the dead:

This is a useful trick if you had a Sim die. When Sims die, they leave an urn or a gravestone behind them which your Sim will mourn for 24 hours. After this time you can pick it up in furnish mode and sell it. You only get about 3 to 10 Simoleans for it, but it is better than turning your garden into a cemetery.

Hint: Another chance with the baby:
If your baby gets neglected and the social worker appears, quickly pause game play. Enable the move_objects on code and enter build mode. Select the hand, pick up the social worker, and delete her. A new baby will appear in the middle of the room, and you can re-name it.