Enjoy the simple things.
Laugh often, long and loud. Laugh until you gasp for breath. And if you have a friend who makes you laugh, spend lots and lots of time with him/her.
The tears happen: endure, grieve, and move on. The only person who is with us our entire life, is ourselves. Live while you are alive.

Surround yourself with what you love: Whether it's family, pets, keepsakes, music, plants, hobbies, whatever. Your home is your refuge.
Cherish your health: If it is good, preserve it. If it is unstable, improve it. If it is beyond what you can improve, get help.

Don't take guilt trips. Take a trip to the mall, even to the next county, to a foreign country, but not to where the guilt is.

Tell the people you love that you love them, at every opportunity.
Forgive now those who made you cry. You might not get a second time.