I second phone cards...I always give them as extras.. and on a past cruise I gave one to a lady would I would always see cleaning the atrium/beatstreet area. She was so sweet and would always stop and say hello and smiled and asked if I was having fun. She worked so hard, and always had a smile on her face. Stopped her one day and gave it to her and thanked her for her hard work keeping the ship beautiful for us. She got teary-eyed and gave me a hug. It was worth the few bucks I spent on the card just to make her day.