How to save your marriage...replace your wife's home button
After 14 months of use the home button on my wife's iPhone 4 failed.
Using the iFixit repair guides the job could not have been any easier. I will say that I was not looking forward to trying to tell the difference between a 1.2mm and a 1.4mm screw. Luckily I had the foresight to lay everything out in order as I disassembled it.
Two things. First, as I said, lay everything out in order as you disassemble it. Second, buy your tools and parts from iFixit. The amount of information they are providing for free is a huge benefit to everyone. They deserve our support.