a. Teach yourself morse code. Too difficult? Learn a second language.
b. Sweep up dust bunnies that have taken up residence under your bed.
c. Attempt ten sit-ups a day. Stop if tired, or pass out from exhaustion.
d. Binge watch all your favorite television shows.
e. Pull out any grey hairs that have made a sudden appearance.
f. Arrange all your canned goods in alphabetical order.
Or sit around and do absolutely nothing. You have my permission.