During the holidays, it's almost inevitable that someone at the dinner table will ask you for free services related to your career. If you're a lawyer, you'll likely be asked for legal advice over the Christmas ham. If you're a doctor, your distant cousins might ask you if the mole on their neck is benign after a few too many glasses of grog. And if you're a daycare worker, you'll likely be asked to volunteer for free at your school's kiddo Christmas bash.