Not in an email, not on Twitter or Facebook, but really: laugh out loud. Whether you like watching Family Guy or Seinfeld reruns, if it gets you chuckling, it’s good for your heart. Research from the University of Maryland Medical Centre shows that laughter helps relieve the stress that damages the endothelium, the tissue that forms the inner lining of blood vessels and helps your blood flow. It also promotes the healthy function of blood vessels.