Do:

Buy the bendy straws.
Laugh at yourself. Don't worry; there will be a good reason to at least once a day if you pay attention.
Eat a good breakfast.
Kiss your mom.
Separate content from presentation.¹
Hold doors, for guys and girls. It's little kindnesses that make the world a better place.

Kiss your dad, too.
Listen carefully to people you disagree with. If you can't argue their position to their satisfaction, you don't know your own.
Go to bed at least once with the sink full of dirty dishes. It will not hurt you.
Remember that if something awful happens and you think, Someday I'll look back on this and laugh, there is no reason not to go ahead and laugh right now.