You can stop being stressed out by learning ways to cope with your stressors. AnxietyBoss.com (Anxiety Help Online) is a great online resource to help you learn ways to cope, so that you are not so stressed out.
You can also get the book Anxiety Protocol (Anxiety Self-Help Book). Anxiety Protocol goes into detail about what type of anxiety you have, and how to treat your particular type of anxiety.
Finally you can also consider taking KalmPro (Anxiety Natural Supplement). KalmPro has natural herbal and dietary supplements that have been shown in research studies to be effective for eradicating anxiety and stress.