It's easy and comes at only the cost of about 5 minutes. It's Reiki but for dudes, dude.
Lie on the floor, on your back. Put one hand on your chest and another on your belly. Now, take a deep belly breath. You should feel your belly rise earlier and further than your chest. Practice trying to breathe from your belly until it gets as easy as it did for you as a baby. Belly breathing is a great way to relax and relieve your stress, dude.
Now once you're good at it, imagine that yin and yang energy coursing through you. When you inhale, the yin energy comes in through your head and down to your feet. When you exhale, the yang energy flows out. Far out, dude. Do this for about 20 breaths and let all your worries go. You can't let that shit get to you. Life goes on, man.
I hope you have a nice laid back, relaxing day