Stress is very damaging to the body,  especially if it's prolonged.  It's a good thing you want to manage yours and to do so here are some simple techniques you could adopt:

1. Avoid the Stressor

You should try to avoid the person or whatever is bringing on the stress as best you can. 

2. Talk to Someone

Talking to someone about the stress will bring great relief to you,  especially if it's a problem that can be worked on easily. 

3. Exercise

Performing daily exercises has also been know to reduce stress and it should this time too.