Drink plenty of water. Loma Linda researchers say water thins the blood, and makes it easier for your heart to pump. It can also help prevent dangerous clots from forming, which cuts your risk of heart attack in half. Find yourself falling short of the minimum five glasses of water a day? Download a free app, like Waterlogged for the iPhone, or Aqualert for Android. You can set the app to remind you to drink. It’ll also track your water consumption, and show whether you’re meeting your daily goals.