How do I maintain my expansion tank?

what's the best way to take care of my expansion tank? how can I keep my expansion tank working well? do I need to do anything special for my expansion tank? how often should I check my expansion tank? what maintenance does an expansion tank need? What maintenance does a thermal expansion tank need? How do I keep my thermal expansion tank in good shape? What should I do to maintain my thermal expansion tank? How can I ensure my thermal expansion tank works properly? What upkeep is required for a thermal expansion tank?