"In other words, are there any real life hacks that are not obvious that result in significant quality of life improvements?" Get a comfy bed. Buy comfortable

"In other words, are there any real life hacks that are not obvious that result in significant quality of life improvements?" Get a comfy bed. Buy comfortable shoes. Spend more money on things that make you happy and less money on things that others tell you should make you happier. Housing is a great example, there is a lot of evidence that housing size doesn't improve happiness but living close to work and minimizing commute time increases happiness significantly.