A person can face a wide range of issues during his or her lifetime. Some of these issues can be handled by your own and some of them are not just in your control. And the ones that you cannot control or eliminate can grow into bigger issues and can even take down the quality of life. Family problems, relationship problems, anxiety, depression, stress, drug abuse, etc are the most common problems that can take down the quality of life. You can really start to live a very miserable life in these cases. Sometime you don't have any control on them.