Pick one subject, not allowing yourself to move more than a fixed distance
(eg a 20-foot radius in a garden).
The subject should be a challenge—something ordinary, so that you’re forced to work
hard to make an interesting image. Shoot it with as many lenses, angles, apertures, etc as you like, but restrict
yourself to that subject only.
Your homework after the shoot is to analyze your work: did you come up with something new or
different from your usual approach?
This exercise is a good one for those outings where you have other duties (eg supervising kids),
where you’d otherwise be bored stiff. You can also do it at a restaurant table, lying on your back under a tree, waiting
in line at a bus stop, etc.