Quídquid agís, prudénter agás et réspice fínem!
Whatever you do, do it prudently and consider the end!
I have learned to enjoy every moment in my life, because it could be anytime the last one.
Do not sit the whole day in front of your computer or your Television.
Take a hike, breath some fresh air, meet some friends.
You getting older each day, honestly, and nobody knows how long you can really enjoy your life.