Breath exercises and yogas help one grounded. I think they relates more to earth? What about water? Is there any physical activity can help one balance element water? I know one can invoke water but that is on advanced meditation.
Sex or masturbation. Any form of expression .. music, dancing. If you lack it, meditate upon oceans, seas, like in the preliminary invocation of elements. Massage your belly. Yoga for the Sacral chakra.