If you are going to write anything worthwhile, anything that anyone will be affected by or remember, know this: don’t even aim at catching the bluebird. Just write as much as you need to to remind the reader that the bluebird was there and has flown. The reader already knows this, somewhere down deep inside. He just needs to be reminded.
If the writing is really good you will awaken in the reader those dim memories of the bluebird and its flight and he will see once again the thing he really loved and learn once again the identity of the ghosts that haunt him.