The talk was by Pres. Dieter F. Uchtdorf, Second Counselor in the First Presidency
It's titled Of Regrets and Resolutions
In it he challenges us to:
"Resolve to spend more time with those we love.
Resolve to strive more earnestly to become the person God wants us to be.
Resolve to find happiness, regardless of our circumstances."
Here's another small excerpt:
"We shouldn't wait to be happy until we reach some future point, only to discover that happiness was already available -- all the time! Life is not meant to be appreciated only in retrospect."
I encourage you to read, watch, or listen to the entire talk by clicking here. It's quite inspiring.