Feng Shui
When adding objects to the house, don't place too many small/decorative items. I found that when I added alot of items the message appeared saying:
'Sorry, but adding that there would totally ruin your Feng Shui' or something similar. However, attempting to place it somewhere else will give you the same message, so I think it's something to do with the amount of objects in your house. So try to buy all the important items (like beds, skill equipment etc) first and then get the smaller items.
If you need more help, we've got more The Sims 2 cheats and also check out all of the answers for this game
Comments for this hint