Let yourself cry. It's a great way to release the buildup of accumulated tensions, and it can make you feel tremendously alive to sob quietly or out loud.
Do something that will draw out tears. The best way to do this is to rent a movie that makes you cry. Even though you know the story, or at least the ending, and are prepared for what is going to happen, the movie will probably still make you cry. Ask your local video store what the best tearjerkers are. If they can't recommend one, try Love Story or Terms of Endearment.
After the movie, get in touch with the feelings engendered by what transpired on the screen. What constitutes the poignancy of human existence? What is the nature of tragedy? Why has the tragic figure been a part of human drama since the beginning of civilization?
Become aware of how much energy is released during your cry, how tired but clear you feel afterward, the depth of your emotions.
If you have unresolved grief, take the opportunity to become aware of it today. See the connection between what you just witnessed and your own tragic history.
— Alan Epstein in How to Be Happier Day by Day