When dealing with emotional pain such as grief, heartache, etc..that is not tangible how did you deal with it?

Going through emotional pain is not easy. When it feels like someone is putting an invisible knife through your stomach and twisting it never taking it out what do you do? Crying all the the feeling like you want to die is not always an option in a busy world. Everyone is different in how they deal with pain. Bad or good, right or wrong. If you know what I mean how did you deal with stage of your life?