The understanding of jets and jet substructure has rapidly become a topic of high activity in both the theoretical and experimental communities. Many new physics models involve highly boosted hadronically-decaying particles, which result in jet-like objects with large intrinsic masses and well-separated constituents. Discrimination of these heavy jets from ordinary quark and gluon jets is possible through a plethora of new techniques. A sampling of these techniques and their application to collider data is investigated.