How can I successfully make a PCB at home?
I use a home-made UV exposure unit with transparencies printed on an inkjet printer and pre-coated boards, and get excellent results - 8 mil tracks if necessary. I can make a PCB in 30 minutes or so, not including drilling the holes.

Here's a photo of my UV exposure unit, it's made from MDF and strips of wood. A sheet of glass sits on the wood strips at the top, of course. I left space for a third tube. I use an exposure time of 11 minutes.