Do you work on a team where not everyone is enthusiastic about good design and writing automated tests? How can you promote good practices? This handbook is a collection of concrete ideas for how you can get started with a Coding Dojo, where a group of programmers can focus on improving their practical coding skills. When you step into the Coding Dojo, you leave your daily programming environment, with all the associated complexities and problems, and enter a safe environment where you can try stuff out, make mistakes and learn with others. It's a fun and rewarding activity for any bunch of coders!