Easy money:
Note: This trick requires two memory cards and a file which has some type of animal (preferably cows or sheep). Copy the file to memory card two, then play the game on either file. Go to your diary and choose to exchange animals. Have an animal come in from the other memory card. When this is done, sell the animal repeat as many times as needed.

Save money:
Instead of upgrading from level to level, just upgrade it with the final ore for only 5,000 instead of 11,000!

Power Berry locations:
Get 1001 medals in horse races.
Give an egg to the water fall and everyday the Harvest Goddess will appear. One day she will give you the Power Berry.
Win the swim festival.
In Winter, go to the cave in the lake. Press X to the left of it and you will find it.
In the cave behind the waterfall.
In the cave in the middle of the lake.
Buy one from the home shopping channel.
Fish in the ocean and find one.
Attempt to chop down the cedar tree. It will ask " Are you really going to chop me down?". Answer "No" and you will get a berry.
Plant lots of flowers and Ann will appear and give you one.

Karen:
Use the following trick for an easy way to get Karen to like you. Get the biggest rucksack, and get the winery lady to sell you as many wines as you can hold. Then, give them all to Karen. If you are fast, you can make two trips a day.

Anniversary:
Your anniversary will not appear on your calendar. If you know the date, enter your house at 12 o'clock in the day. There will be food on the table. Speak to your wife. go outside and when you come back inside, the food will be gone. Also, your anniversary is activated after 12 in the day.

Make your wife leave:
Give your wife many things that she hates (preferably weeds) until her heart turns black, and she has no hears on the start menu screen. Then, go to sleep. The next day the game will state that your wife is gone and you will shake your head.

Throw items far:
If you are holding an item, stand on top of some steps and throw the item down. This also works if you stand on a bridge.

More money for honey:
If you plant flowers on your farm and have a beehive, give some honey (worth 10G) to Louis. A day later he will say that it was a rare species and you will get more money for the honey.

Chickens
When Rick asks if you can take care of his chickens, answer "Yes". When you take one egg and put it in the incubator, he will take the chickens away but not the egg. The egg will become a chick and grow up and lay eggs.

Non-stop help:
This is especially useful when you are full on animals and it becomes difficult to feed them, talk to them, and tend their products. Give the harvest sprites flour bags every day for the first year so their heart-o-meter is full. Then in two sections of four, send them every other week to help the animals. While one group is helping you, give flour bags to the four that are not helping. They will do an excellent job of taking care of your animals and you do not need to worry about them until the end of the day when, if desired, you can talk to them to raise their heart levels slightly quicker.

Recycling garbage:
If you cook garbage you get from fishing, you can give it to May or cook it and give the ruined food to Karen.

Strong fence for animal pasture:
At the beginning, save the rocks in the bottom corner or other place. When you clear the fields, use these to set up a fence.