“The most important time in life is the present.”
Don’t put off until tomorrow what you can/should do today. If you are having a fight with a friend, then apologize to them today. If you haven’t contacted your parents or relatives in a while, then do it today. If you like someone and want to meet them, then tell them today. Today is when everything that needs to be done gets done. Tomorrow gives us hope for a better today while today is doing what you need to do for tomorrow.