Bill.  I want to learn how to make jingles but when I try doing it, it just sound random and off key, like the chords are fighting with each other rather than working together to create a catch jingle.  I would not want to copy you, but what's your approach to coming up with a jingle and the chords that support it?
it comes naturally to me, but that's probably because i've spent literally my entire life hearing and experiencing and playing and experimenting with music, up down and slant ways