Busy fingers make happy hands. Keep your mind active. Read. Write. Work math or word puzzles.
Or…

Early this year — when Covid 19 was first getting an official name and riding airplanes and ships throughout the world — I decided to work jigsaw puzzles. My goal was to keep my fingers busy with puzzle pieces instead of food while watching evening TV.
Months later — results are mixed. Lots of puzzles have been worked. Some I owned, a couple I checked out from the library, and a timely gift of dozens of used ones filled some boxes.
Did I stop eating? No.
Gain weight? Not much.
Enjoy the challenge? Definitely!