The Sims 3 - Platform: XBox 360

Cheat mode:
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Once your family is in a house or location, pause the game, hold LB + LT
+ RB + RT, and it will say that Spoot is now available under "Decor
Miscellaneous". Place him on your lot, and all cheats  will become
available. Note: Using cheats will disable challenges and
achievements. However, you will be given the option to save your
neighborhood before enabling cheats so you can resume the game later
without cheats enabled.


Easy money:
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Start writing novels on your computer. Write fiction novels as they take
the least amount of time. They will not bring you too much Simoleons.
When you write, your skill will automatically advance. If your skill is
high enough, you will be able to write more novel types/genres. The most
money can be made from "Romance Novels". You will get royalties for six
weeks once you finish a book. With the "Writing" skill maxed out, you
can make approximately 40,000 Simoleons every week, which is more than
the 34,800 Simoleons you can get by purchasing all neighborhood
businesses, and takes less time to achieve. In three game weeks you
should have a very high speed writing, 9 or 10 novels as best sellers,
and 100,000 Simoleons.


Saving money:
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No matter how many times you use an object, if you sell it the same day
you got it you can get all your money back. If your Sim is poor and
needs body points or something else, buy a body machine and keep selling
it back to get a refund of all your money.


Easy Cooking, Fishing, and Gardening skills:
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This trick requires a TV with a Cooking, Fishing, or Gardening channel
and a video game system. Have a Sim sit down and watch television. Switch 
the TV over to one of the previously mentioned channels so that the Sim 
can start earning his or her skill point. Then, have a second Sim go over
and start playing video games. Notice that although the TV is displaying 
video games, the first Sim still has the skill meter above their head. 
Allow this Sim to sit there for as long as they please until they decide
to do another activity of their own. After that, the skill meter should 
stay above their head until you start another Cooking, Fishing, or 
Gardening skill activity. As an added bonus, you can train two skill 
points at once. For example, work out and both the Athletic and Cooking
skills will continue to rise. If you keep repeating the steps until each
skill channel has been viewed, the Sim will keep learning the three 
skills as he or she goes on about their daily life, and four when doing
skill activities.


Free bookcase skills:
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Buy a bookcase, then have your Sim begin to study. Interrupt the action
so that the book is placed on the ground. Sell the bookcase. The book
can now do everything the bookcase could have done for free.