I found these words from President Thomas S. Monson to be particularly inspirational:
"How fragile life, how certain death. We do not know when we will be required to leave this mortal existence. And so I ask, “What are we doing with today?” If we live only for tomorrow, we’ll eventually have a lot of empty yesterdays. Have we been guilty of declaring, “I’ve been thinking about making some course corrections in my life. I plan to take the first step—tomorrow”? With such thinking, tomorrow is forever. Such tomorrows rarely come unless we do something about them today.
As the familiar hymn teaches:
There are chances for work all around just now, Opportunities right in our way. Do not let them pass by, saying, “Sometime I’ll try,” But go and do something today.7
Let us ask ourselves the questions: “Have I done any good in the world today? Have I helped anyone in need?” What a formula for happiness! What a prescription for contentment, for inner peace—to have inspired gratitude in another human being. Our opportunities to give of ourselves are indeed limitless, but they are also perishable. There are hearts to gladden. There are kind words to say. There are gifts to be given. There are deeds to be done. There are souls to be saved."
Like he said, our opportunities are limitless-but they are also perishable. We have to really live today, both in improving ourselves, and in helping others. I hope to never put away a thought of a kind thing that I can do for someone--whether inspired by the Spirit or random thoughts.