Future healthcare is an important issue involving various organizations, businesses as well as research groups. As people live longer and acquire various chronic-diseases the burden on the whole society will increase. While certain serious conditions require professional monitoring, the majority of chronic-disease patients can avoid deterioration if they become more aware of their lifestyle choices and the impact they have on their wellbeing and take action. Advancements in technologies allow us to create better, less obtrusive and more pervasive self-monitoring systems that can support users in observing and understanding their behaviour and, hopefully, enable them to make positive changes to their lifestyle. Our work focuses on various aspects such as: building new sensors and sensing systems, building data collection systems and algorithms that can process and correlate such data and creating better interfaces that allow users to explore and understand their data as well as become part of the data interpretation process.