The words "Think and Thank" ought to be inscribed in our hearts. Think of all we have to be grateful for, and thank Allah (swt) for all our bounties. 
We all have a tendency to crib and indulge in self-pity, where we whine about how tough life is and complain about all the things that we have not got. But if we reflect and focus on the blessings Allah (swt) has endowed us with, life will be miraculous. Remember, “To multiply your joy, you must count your blessings.”