Emacs command of the day: rename-uniquely. Great if you want to hold on to a *Help* buffer whilst looking at the help for other things.
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It's weird how email addresses have become a useful way of uniquely identifying people in usernames. This isn't something email was originally intended for.
It makes sense: I imagine postal addresses and even names change more often than email.
Emacs tip of the day: if you're regularly running multiple compilation commands, use M-x rename-uniquely in each *compilation* buffer.