Yoga is a wonderful practice for strengthening your body and flexibility. It is also great for the mind. Yoga is a very quick practice that actually can be tailored for however peaceful or vigorous you are looking to make it.
Yoga, through its stretches, helps to reduce stress physically through the muscles. It can also help reduce pain for people with certain conditions. The specific breaths used in yoga can help to improve breathing through better lung function and reducing stress.
Yoga also helps you to focus on the present, so as to help become more aware and help increase concentration and creativity. This practice is just a quick online search away.