How Do You Create the Pound Sterling Symbol (aka the GBP Symbol) £ when You Are Using a U.S. Keyboard?

Problem scenario
You type emails or type text in Notepad or Wordpad (e.g., in Windows).  Sometimes you use a web browser in Windows.  You want to create this symbol £.  What do you do?

Solution
Hold the "Alt" key and type "156" (with no quotes).