Apparently the word tip – as in giving a tip to a waitress – was originally an acronym for ‘To Insure Promptness’? I’m not sure if that’s true, but the Tipping site offers this fact and many more on the subject for our edification.

So whether you are paranoid about the etiquette of tipping or just an interested observer, this is the site for you, complete with a downloadable Excel tipping spreadsheet.