On a new lot, put down staircases to lower the terrain. Go to the bottom of the first one and miss out one tile and put down another staircase. Do this once more and you should have three staircases. Get rid of the staircases and use the "Level Terrain" tool to level the terrain from the lowest tile. Set it as big or small as desired. Using the "Straight Line Wall" tool, build walls around this hole so are walls pressed up against hills. Be sure to build the room above so that it covers the entire basement. Cover around the house with the "Foundation" tool, assuring that all the slopes are covered up. Place one tile in the top floor, then create a staircase leading down to the basement. Make two or more foundation blocks at the front of the house, and finally place a staircase leading up them.
To learn bookcase skills for free, buy a bookcase and have your Sim begin to study. Interrupt your Sim so that they place the book on the ground; then sell the bookcase. You can use the book that is on the ground to do everything the bookcase can do.
You can sell items the same day they are bought and get all your money back, no matter how many times you use an object. If your Sim is poor and needs body points or something else, buy a body machine and use it repeatedly. Then keep selling it back to get a refund of all your money.
To easily make friends, get your guitar skill to 5/10. Then, go to the park and select "Play For Tips". People who watch you will become your friends. The higher your guitar skill, the faster they will become friends with you.
To get unlimited pizza, have a Sim call for Pizza, and when the delivery man arrives, do not accept the pizza. The pizza will never get stale. Continue to do this and the delivery man will stack the pizzas on top of one another.
You can de-activate aging by going to "Options" and then "Game Options". When you uncheck the box next to "Aging", your Sims will no longer age older. You can also slow the aging process down in this menu by setting the "Lifetime" bar from 25 days to 960 days.
To perform this trick, you will need a TV with the Cooking, Fishing, or Gardening channels and a video game system. Have one Sim watch TV on any of those channels to start earning skill points. Then, have a second Sim start playing video games on that TV. The first Sim will continue to earn skill points. Allow the Sim to sit their until they move on their own. The skill meter will continue to stay above their head. If you repeat the steps until the Cooking, Fishing, and Gardening channels have been viewed, the Sim will be learning three skills at once.
To avoid dying, go to Pleasant Rest Graveyard and harvest the flowers from the "Death Flower Bush" which is located near the gate. After you die, your Sim will give the flower to the Grim Reaper and become resurrected. This flower will not reappear there again. However, it is possible to grow the "Death Flower Bush" if your Sim has Level 7 Gardening by planting the "Unknown Special Seeds" found in the graveyard.
To make a Ghost baby, set one of your female Sim's traits to Kleptomaniac. Go to the graveyard, and have the Sim steal male remains. A ghost will appear 11:00 P.M. and disappear at 4:00 A.M. on the second day after stealing the remains. It will continue to appear every other day. Socialize with the ghost every time it appears and become best friends with it. Get the "Fertility" award and confess your attraction to the ghost. Ask the ghost to snuggle on the bed, and kiss him. Try for a baby every night and you will eventually have a ghost baby.
Read "Easy Cooking, Gardening, or Fishing Skill" by Tony Ortale and keep repeating Tony's steps until each skill channel has been viewed. The Sim will keep learning the three skills as they go about their day. They’ll learn four skills when doing skill activities.
To easily earn money, have your sim write novels on the computer. Fiction novels take the least amount of time, but will not bring you the most Simoleons. Romance novels will earn you the most Simoleons. After maxing out the "Writing" skill, you can make as much as 40,000 Simoleons every week.