Looking back on 2020, lockdowns and pandemic restrictions forced many people to start new routines. Work commutes disappeared. Fitness classes were canceled. Homes became classrooms and workplaces.

Some people thrived with all the changes; others struggled.

"The experience of 2020, as hard as it was, held many lessons,” said Gretchen Rubin, author of the book "Better Than Before: What I Learned About Making and Breaking Habits.”