Okay, so you know how you want more lifetime happiness points to get the fertile treatment etc. But you aren't getting enough points? Well on the Main menu page press Ctrl + Shift + C and you will see a blue bar appear on the top. Type in exactly this: TestingCheatsEnabled On
Then click your family you wish to play. Once your game loads. Go to your lifetime happiness thing. You should see the treasure chest like normal. BUT then hold down Ctrl and on the right of the number of point you got, while holding down ctrl at the same time you keep clicking on the top right of the points you got and then the number of points you got should go up a lot! If your confused I explained as much as possible.