Meditation has long been known in Eastern religions as a way to reduce tension and attain peace of mind. There are variations some of which might not be suitable to everyone or if practiced in the extreme. This topic is worth studying if you are having trouble breaking the anxiety and stress habits.

Some basic meditating might easily replace stress and tenseness with peace of mind and relaxation.

An over simplified effort might be:  
    
Find a quiet place by yourself.  
Get in a relaxed position.     
Rest your eyes downward, almost closed, not tight.     
Breathe slowly and naturally.     
Do not think about anything else except what you are doing.     
Do this for 15-20 minutes.

When lying wide awake in bed, or taking a calming break, try fixing your eyes and thoughts on an insignificant mark on the wall, a small glittery area, or perhaps a shadow. Keep staring at this and think of nothing else. As your eyes wander off bring them back to the object. With practice this will often send you off to a dreamy, peaceful state.

“Meditation has been defined as the cessation of active eternal thought” – Helena Blavatsky (1831-1891)