Near the gate at Pleasant Rest Graveyard there is a bush called 'Death Flower Bush'. Harvest the flower from it and keep it in your Sim's inventory and if you die that Sim will give that flower to the Grim Reaper and be resurrected. The flower will not reappear there again but if your Sim has level 7 Gardening they can plant the Unknown Special Seeds found in the graveyard and some other places that have a chance to grow as a Death Flower. It is also worth having the Green Thumb trait which can be used to revive the plant.
Increase Chance to have Boy Babies:
Have a pregnant female Sim eat apples to increase the chance of having a boy.
Increase Chance to have Girl Babies:
Have a pregnant female Sim eat watermelons to increase the chance of having a girl.
Increase Chance of having Twins or Triplets:
Have one or both parents have the lifetime reward of Fertility Treatment.
Changing your Name
Do the following if you want to change your Sims name but don't want to start over again from scatch. Go to your map and find the City Hall and there will be an option to change your name during the daytime between 8:00 a.m. and 9:00 p.m. during the week (Monday through Friday).
Duck Time Moodlet
If you buy the Ducksworth of Bathington from a grocery store (or find one fishing) and place it in your bathtub your Sim will get the Duck Time moodlet when they take a bath. The Duck Time moodlet gives a +15 boost for four hours.
An easy way to make money is to start writing novels on your computer. Write fiction novels as they take the least amount of time. To begin with the novels won't bring you much Simoleons but your skill will automatically advance the more you write and when your skill is high enough you will be able to write more genres. The most money can be made from Romance Novels and you will get royalties for six weeks once you finish a book. When you have the 'Writing' skill maxed out you can make about 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.
Getting Rid of Dirty Dishes
To do this drag an empty plate into a Sim's inventory then drag it to sell. Although you will not make any money by doing this it is a fast and efficient way of getting rid of dirty dishes if your Sim does not have a dish washer.
Learn Four Skills at Once
If you 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 he or she goes on about their daily life and the fourth when doing skill activities.
An easy way to make friends is to buy a guitar and learn how to play it. Keep learning how to play until you reach 5/10 level and you will gain the ability to 'Play For Tips'. When you have this ability go to the park with the guitar in your inventory and select 'Play For Tips'. People watching you play will become your friends and the higher your guitar skill the faster they will become friends with you.
Buy any fish at the grocery store go home put it in you're fridge then go to sleep then put fish in inventory then go to the store and sell them.
You can use this trick with new profiles to earn yourself unlimited money for the life of that profile. Start the game by purchasing an inexpensive house, a bed, a refrigerator, and a toilet. Next, buy 100 three-star catfish at the store, then return home. Sleep overnight, then return to the store to sell the catfish for around $17,000 apiece. From that point onward, you'll never run out of money while using that profile.