Oh, BTW somthing else I find works well for me, when you think the song is complete and the final shine is given to the words, put it to one side completely for AT LEAST 24 hours ( a whole weekend is better)!! dont think about it, hum it , look at the text, NOTHING. then open it and see if it seems fresh, and if it does, revise, and sing it through, at least once aloud. If you still like it it is probably ready, but you may still make changes as Performance changes the alliteration and "feel" of a song.