Things to worry about:
Worry about courage
Worry about cleanliness
Worry about efficiency
Worry about skill
Worry about learning
Worry about reading
Things not to worry about:
Don’t worry about popular opinion
Don’t worry about materialistic things
Don’t worry about the past
Don’t worry about the future
Don’t worry about growing up
Don’t worry about anybody getting ahead of you
Don’t worry about triumph
Don’t worry about failure unless it comes through your fault
Don’t worry about disappointments
Don’t worry about pleasures
Don’t worry about satisfaction