Drink plenty of water to help flush bacteria out of the urinary tract. Pure cranberry or pomegranate juice are excellent purifying drinks.
Yogic practices which concentrate on the kidneys and abdomen like Dhanurasana (Bow pose), Bhujangasana (Cobra pose) and others.
'Shitali' - a cooling pranayama or breathing exercise is recomended. Shitali also helps dispel emotions of anger and frustration. It is a practice that brings tranquility and contentment to the mind.