It’s a good idea to show your doorman, babysitter and dogwalker how much you appreciate them during the holidays with a little cold, card cash. But how much are you really supposed to give them? And, more importantly, are you actually supposed to tip your super?

The folks at Rentenna provide everything you need to know to properly tip your “support staff” (doesn’t that sound bourgeoisie?) this holiday season.

2012 Holiday Tipping Guide from Rentenna