Shred Your Enthusiasm: For Those About to Rock - Premier Guitar
This is a pretty good read. Lots of good advice in there.
Great advice. One thing I do is keep ear plugs in my wallet. If I find myself in a loud situation I have protection. I wear ear plugs at every concert I attend. Not having ringing ears afterwards and not cringing while the band plays is great.
On a sort of related note: Don't keep condoms in your wallet. They wear out from all the stress and might make you a parent.