I used a few rubber bands rigged up tight around the base of the tap handle and the tap itself so it would "snap" back to closed when you let go. It didn't make it that much harder to open the tap and pour but worked great since it would always pull the handle back to the closed position when...
The past 3-4 batches of beer I have brewed all are way over carbonated once bottled. To the point where when opened the foam just keeps coming out for 5 minutes. I just started all grain brewing and have just started using a copper wort chiller, but those are the only changes I can think of...