Be grateful when you see the sun rise. Smile when you go outside in the morning. Be kind. Have a slow temper. Be indefatigable. Carry yourself with honor and dignity. Be grateful for a friend or a stranger who might share food and drink with you. Forgive. Praise. Do good. Always make some deposits into the account of your life, others, and Earth not always just withdrawals because you don't want to go bankrupt.
We live in this borrowed world. To be a simple human being, there isn't anything special you need to do. Be responsible and care for others. If you are doing all these for investment or worry of after life, then itself is wrong.