Position your Discussion chapter correctly. It is the final chapter in your thesis, following the Results section and preceding your References section.
Discuss your findings compared to previous research. You will already have detailed such research in the Literature Review section; here, it is necessary only to discuss whether your results corroborate or challenge existing perspectives.
Focus on any anomalies in your results. Question why such anomalies occurred, if the experiment design is to blame or whether the anomalies warrant further investigation.
Contextualize your results in a societal framework. Broaden your discussion out to state what impact and relevance your results have on society and your particular academic discipline.
Draw conclusions from your findings. Note any trends or unexpected patterns that have appeared in your results. Suggest paths for further investigation that other researchers might want to follow.