I feel like the question in the title leaves out important context. Like, why do you need to motivate people at all? Presumably it's because they aren't happy

I feel like the question in the title leaves out important context. Like, why do you need to motivate people at all? Presumably it's because they aren't happy to do the work you ask of them, and the reasons for this can vary wildly, from the divorcee suffering a depression to the QA temp that knows you think of them about as fondly as of the stack of papers that stabilises that one wobbly table you don't like anyway...