So you found yourself having to work in a piece of legacy code. Maybe you wrote it yourself, maybe a former colleague. Maybe nobody really knows. But don't panic. Legacy code can be rewarding and fun. But for it to be so, we need to improve it. And it makes both sense business-wise as well as for your own sanity. Because in your career, you will most likely be working on code that you'll consider legacy code. In this talk, I will explain some techniques and approaches to improve legacy code that have proven successful in my experience.