We all know it’s customary to tip cabbies, waiters, bellhops, bartenders and all the usual service people. Have you ever wondered about others encountered in your travels who may also deserve your consideration?

Some examples are airline desk employees, hotel clerks, kind strangers who give you directions in foreign cities, street performers, gallery guards, police, delivery guys and others. They're people who perform a good deed for you who don’t ordinarily get a tip.

They sometimes at first refuse, but when you smile and say their next lunch is on you, they may accept. And you’ll feel good about doing a good deed.