Thoughts about the end of the world?

Ok, so I know it’s a pretty grave subject, but I want to know what you guys think. And actually, not so much about death, but about life. As a Christian, I was always taught to “be vigilant” about Christ’s second coming and whatnot. But then I started thinking, “Why be on edge all the time thinking that the world is going to end, when I can be enjoying the life God gave me and helping others around me?” Anyway, whatever your religion, I would like to know your thoughts and how you feel about this subject. You can really post anything; this is going to be pretty open.