Reviewing the literature is a critical step in the research process. Whilst there are many different types of review articles the purpose of this chapter is to provide a brief reference guide for those who are attempting a systematic literature review for the first time. This includes information around registering your systematic review, developing eligibility criteria, formulating a search strategy, approaches to data management, guidance for quality and risk of bias assessment and data (meta-)analysis. This chapter should help to set individuals on their way to conducting a rigorous systematic review.