I have always had success using the tilde as a separator on alternate lines with chords marked over the appropriate words, making sure to use the linebreaks appropriately. Thus:
I didn't know God made Honkie-Tonk Angels,
I might have known you'd never make a wife
The easy way to do this is to put a whole line of tildes in alternate lines, with the other lines the lyrics, and then drop the chord letters in place where they belong replacing the tilde characters over the correct words.