Small ideas to guarantee a great future is a short book, directly and clearly, a set of proposals designed by Terra Foundation for the Consell Assessor per al Desenvolupament Sostenible from Catalonia Government. This collection have the objective that all of us can put into practice and influence sustainability in our country. Also, they offer a good number of examples, some of them innovative, of what we can do and of what has been done here and around the world to change some of our daily activities. Since sustainability is also participation, the real aim of these examples was not to convince or direct people to behave in a certain way but to contribute with tools and examples to live our daily life in harmony, with the wish to help global sustainability. Thus, no strength has been put into actions that are already widely known (such as recycling, water saving or use of recycled paper), but into new and ingenious items from which we can learn something and that, at the same time, can surprise us. We hope we have been successful in our goal.