If your chord changes sound disjointed, you probably need to use inversions. That's just the fancy word for re-ordering the notes of a chord. For example, Am can be A C E, or C E A, or E A C. So, if your progression is jumping around from one chord to the next, re-order some of the notes to smooth the changes.

Ray & Kate :)

PS: For more on this hack and others, read our Songwriting & Producing PDF. It contains everything you need to know for making good music, all in one PDF.