how to get into the right mindset to consistently write lots of songs http://blog.sonicbids.com/author/benjamin-samamags
What's the Purpose of All the Different Song Sections? (With Examples) http://blog.sonicbids.com/songwriting-101-form-purpose-of-song-sections-with-examples
How to Use Melodic Contrast to Make Your Songs Way More Memorable
http://blog.sonicbids.com/songwriting-101-how-to-use-melodic-contrast-to-make-your-songs-way-more-memorable
Why Your Chord Changes Matter Way Less Than You Think They Do
http://blog.sonicbids.com/songwriting-101-why-your-chord-changes-matter-way-less-than-you-think-they-do
importance of melodic rhythm. http://blog.sonicbids.com/songwriting-101-secret-to-writing-catchy-songs-rhythmic-motifs

These blog posts sound like they'll be useful!