There once was a Roman poet named Horace, he was known to say "Carpe Diem!" 
Translated from latin it means 'pluck the day' or 'seize the day.'
Horace was a wise individual, he was basically saying live for today. Enjoy it, because you never know what tomorrow will bring. 
Live for the moment, relish each hour of the day.
Appreciate life always so that you may smile at the end of each day and rejoice in time well spent.
Some good examples of this might be people you see everyday. 
The friendly sort who always has a kind word. 
Someone that whistles while they work.
Someone who sings while doing household chores.
These may seem insignificant, but when these people smile you know it is genuine. 
I am reminded of a neighbor who always invited me over when she had fresh baked cookies. 
For me as a child it was just a delicious treat. 
Looking back I realize she never ate cookies, just sipped her tea, smiled, and chatted with me in a polite way. 
Now I know, she had a superpower. It was how to seize the day!