Sir Paul Mc C wrote "Yesterday" in a similar fashion, reggie - I wish you the same success with "Dream".
I am fascinated by the songwriting process, and I swear I know less about it than anyone else. Other songwriters agree with me - the songs just "happen", very often, and trying to make a conscious process of it just buggers things up for me.
That is why I am deeply in awe of those great songwriters of the 20th century (Bernstein, Berlin etc) who could give themselves the task of writing a particular song to fit certain circumstances (for example in a musical), and get up a few hours later having written a masterpiece. Now, such songwriters are truly professional. I just meddle.