If you are a Mac based designer here’s a great little short-cut for you. In fact, it shouldn’t be a short-cut, it should be a part of your everyday work-flow.
When working with type don’t attempt to manually create an Umlaut, Acute or Degree symbol. And for heaven’s sake, don’t go looking at some strange font to help you solve the problem. There are short-cut commands to help you with that.