Don't expect anything fancy - you'll live like the local people do. It often helps to have at least an elementary knowledge of the native language. For those who are prepared to 'rough it' and are looking for real first hand experience of another culture, this is an unsurpassed experience, that most travelers will relish for the rest of their lives. The concept of combining a vacation with learning another language is enjoying growing popularity. Especially in Central America this has become one of the favourite modes of travel for eco-tourists.
Many students describe such experiences as the most profound and educative period of their lives.
Many people don't know how to, though they would love to help and be a part of a positive change. Volunteering is a great way to meet new friends with similar interests, have a low cost vacation in exotic places and learn about local issues through first hand involvement. There are many projects with great ideas who may lack funds or human resources and need people to help them manifest their visions. Projects focus on a huge variety of themes, such as conservation, archeological digs, building of community facilities etc.