"Oh, but maybe not violin playing," I concluded, "Einstein probably has you beat at that as well."
According to the researchers at online-phd-programs.org, despite varying fields of interest, there are many things that smart people have in common. Displayed elegantly (and a little hysterically) in an infographic "The Good and Bad Habits of Smart People," show how smart people tend to be avid readers, like to write down their goals and show those goals to their friends, have a tendency to binge drink (see "Cleverest Women Drink You Under The Table because I'm sure the ladies are skewing this statistic), and disdain sleep in lieu of a nice, comfy anxiety disorder, such as depression, smoking, and/or neuroticism.

Source: Online-PhD-Programs.org