Do you ride an exercise bike? You could be harnessing that power to run an appliance, such as a washing machine:
An exercise bike with a lithium-ion battery that collects energy as you pedal is hard wired to the front loading machine. When you pedal, you power the machine. Twenty minutes effort is said to give you one cold cycle wash without drawing power from the grid.
And if you want to pedal across your large yard, check out this pedal-powered lawn mower.