ProducerEnix wrote:TL;DR: How to finish tracks and better your songwriting? Advice for a Forum Newb.
From a creative perspective, the jump from a riff or a motif to a complete song is simply not trivial. Learning certain rules of composition can help here - but only if you are already comfortable with music theory beforehand.
However, I find that a gigantic source on "how to do it", is to study and learn hundreds of the fantastic (complete) songs that have been made in the last seven or eight decades. You get no end of tricks, and when you're working with mr. McCartney or mr. Simon or mr. Cohen or ms. Swift and so on and so on, you're working with some of the most creative minds that have ever been in pop music. It rubs off. :)
Once you have a complete piece (lyrics, verses, chorsus, bridge, coda, the works), transforming it in a finished product is both a mindset and a skill.
The mindset is to simply want it. Hard. That means that you decide to dedicate time to finishing a song instead of noodling some more :) It's gotta be important to you. And decide to stop - not tinker forever. A firm deadline ("I must be done by ...:") helps here.
The skill can be learnt and is both about knowing what's the next steps (arrangement, instrumentation, recording sessions, the sound you want, mixing sessions, etc) and of course the skill to perform each of them (or outsource them if you can't).
Decide the vision and reason for the piece, and work you way to it, one step at a the time. It's that simple, really :)