Mudras are position of hands that affect our body chakras in subtle ways. Do you know that there is a mudra which takes you into samadhi and it is such a simple mudra. All Gurus, saints, Buddha and Gods are shown with a mudra. Just do the mudras for the lower 2 chakras for and after just 4-5 minutes, you will start feeling sensation in the associated chakra. When you do mudra, even if you do not meditate or chant mantra, the chakra starts to heal.
Let me tell you mudra for manipura chakra as this is the chakra which imbalanced makes us feel stress/angry and frustrated.
Put your hands before your stomach slightly above the Navel . Let the fingers join at the tops, all pointing away from you. Cross the thumbs. It is important to straighten the fingers.
Concentrate on the Navel and chant the sound RAM.
Do this for 10 minutes even while sitting in train or bus or watching TV and feel the stress melting away. Of course if you do this in meditation, effects will be greater.