Creating a cool project using Moodle modules that every in the course or site can benefit from or posting individual achievements on blogs or posting suggestions to forums are popular activities for learners to view and be rewarded for. Martin Dougiamas, the original creator of Moodle, states that in a true collaborative environment, people are both teachers and learners. Why not give your learners a Moodle trophy (or at least acknowledgements and fame) for being a great Moodler and promoting collaborative spirit?