Great Meditation 1:2 Breathing
One of the best ways to lower stress is to spend 5-8 minutes a day doing some "meditative breathing."
I recently came across this from a world record holding free diver who recommends something called 1:2 breathing. If you want to research the free diver, his name is Stig Severinsen, and he holds the Guinness World Record for the longest breath hold of 22 minutes under water.
1:2 breathing is really simple.
Step 1: Close your eyes and just listen to your breath in and out for about 30 seconds to a minute (Sitting in a chair or laying on your back)
Step 2: When you start breathing, follow the pattern.... Inhale 3 seconds, exhale 6 seconds. (As you inhale...focus on breathing deep in the lower part of your stomach vs the upper part of your chest)
Step 3: As you exhale, make sure that you provide an area of "friction"...where you are restricting the air coming out of your mouth by using your teeth and/or tongue at the top of your mouth. (Another great way is to constrict your air pipe like you are fogging a mirror.)
From what the free diver says, and my personal experience, this saturates your blood steam with the most amount of oxygen, makes you feel refreshed and stress free.
Let me know how this works for you!