You got a lot of good ideas to work with. Another that might be fun..... there's a website called TAXI.com. They provide listings for music needed by film and TV. Quite often those listings are specific about what they want. They provide the details of what the producer is looking for..... a story line or a topic that they want a song for.

Simply grab one of those and write your song based on that info. They also tell you what genre it needs to be. Ex: Up tempo indy rock about a guy who can't seem to get the girl. OR: Movie ending song about a guy who is missing his wife who was tragically killed in a car accident. Song should be mid tempo, with a rock groove. In the closing scene, he is standing staring out the window at the rain as the credits roll and this is where the song will play.

Try it.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.