Prepare for pranayama, or breathing, practice by opening the chest.
Place a block so that the long side goes parallel to the shoulders. Lay the block flat, and lie down on top of it, placing your shoulder blades on the block.
Raise the arms and space out the shoulder blades to a comfortable position.
Focus on the breath at the backside of the sternum.
Chest opening, and resting the head lower than the chest, has a positive effect on the mood - it brings calm and happiness.