Treat your friends like there is no tomorrow. Treat everyone around you like there is no tomorrow. Appreciate everyone around you. Spend quality time with them especially your family members as you really don't know...

what will happen tomorrow,
what happens at the end of the day,
What happens the next hour

What happens the next minute,
what happens the very next moment,
What happen the next second.

Do you event have the next moment? Most importantly appreciate yourself.