This talk outlines part of my work on technologies for wellbeing and mental health, with an emphasis on their ethical underpinnings. It outlines award winning research described in TOCHI and JMIR journals, CHI and DIS publications targeting emotion and memory processes for digital wellbeing, depression, stress, and dementia. The talk covers several prototypes developed and evaluated with my research group involving smart material interfaces, wearable biofeedback interfaces, 3D food printing, and large displays, as well as novel tools supporting their design. The talk articulates the value of this body of work for novel design implications for wellbeing and mental health technologies and their ethics. Most of the research described in the talk has been supported by the AffecTech: Personal technologies for affective health, an EC-funded Innovative Training Network.