Yep, I like this Colin. Good points.One important motivator is to define why you play. Why do you play? I play saxophone because I can. I need a musical outlet to express myself and saxophone fits the bill. I've tried piano, guitars and various strummed things, woodwinds, mouth organ. Saxophone suits. I get more out of saxophone with the least amount of conscious effort.
Don't set yourself technical goals or performance goals. Set yourself musical goals. You'll acquire the technical skills to accomplish your musical ambitions and you'll know why you want to succeed. Find pieces that motivate, move and inspire you. When you've mastered them, you'll be asked to play them.
Listen to lots of different genres. players, composers and follow what moves you. Anything played, can be played by you, given practice and dedication.
We never feel any improvement in ourselves and this can be demoralising. Many players are surprised how far they've come when answering questions from raw beginners.
It's a voyage of exploration. Launch a probe. Follow your heart. Take a break. Have a think. It may be time to listen for a while to find a new direction or to raise your game or both.