I see a common thread between planting a garden and setting up a high-interest bank or broker account. With both actions, you are exerting some initial effort in the present that allows you to sit back and realize the ongoing benefits of external factors now harnessed. Sunlight and rain will conspire to bring you fresh herbs, fruits, and vegetables. Interest, stock appreciation, and dividends will grow your account balance as you eat, sleep, and work. Long after you go back to your regular routine, that thing you set into motion will pay dividends, be they vegetal or monetary.
It brings me pleasure and satisfaction to think about these things that passively grow in the background of my life.