Rules aren't really what I was seeking, I was hoping for some really fresh magical advice that would suddenly turn me into an assertive writer. Maybe it would just help if I were a more assertive and organize person. As I've been tracking my songwriting abilities they just seem to be increasing over time. So probably by the time I'm 25 I'll be able to write a whole song in 20 to 30 minutes, without losing it or forgetting about it.
I'm the opposite way with lyrics and the guitar aspect. I just makes up little bits with guitar. Then later I'll proceed to string bits and pieces of guitar parts together to be matched to song.