You can't be all serious all the time: and you need to start having more fun. It's okay, you know! Luckily, there should be many opportunities for fun today, so don't turn off your sense of humor or your curiosity. New members of your social group or work team may be particularly fun: new people are an excellent source of good times, because they offer ideas and experiences that you haven't encountered before. Open up. Listen to what the newbies say. They might not know the status quo, but that is probably a good thing.