Tipping at restaurants, bars and coffee shops is optional. A ten percent service charge is already added to the bill. If you feel like service was great, you may leave an extra tip of your choice.
If you stay in a hotel and the bellman takes your luggage to your room, it is proper to tip. Once in the room you may leave a tip for room service personnel and to housekeeping.
In general, use good manners as you would anywhere in the world, at least in the Occidental world. Always say hello, goodbye and thank you with a smile and ticos will be happy to serve you.

