Abstract: Darryn Bryant and I are in the process of writing the Graph Decompositions chapter of the Second Edition of the CRC Handbook of Combinatorial Designs (The Holy Book of Design Theorists). In this talk, I will report on some (but not all) of the things I learned during this process. I will do my best to keep the talk at an accessible level to the student audience AND I will bring lots of cookies, just in case the talk is boring.