I like the Gentleman's Gazette and think there is some great advice there. I find it particularly useful for stuff I find in thrift and vintage shops. However, I take what they say as advice rather than law, and have no problem ignoring it when I chose. For example, they have a lot of prescriptions about what watch to wear with black tie. They say, that it's not supposed to have a day date complication, roman numerals or no numerals, must be black face. I find this a bit persnickety considering nobody is supposed to see your watch when you are wearing black tie.