Making the best use of a coach? Currently I pay for lessons, and I surely see value. I've gotten from the low 600s to being able to give USCF 1200s a run for their money. It's not much, but it makes me pretty happy. 

But I feel like a lot of coaching sometimes is just random topics with a lack of structure. I usually bring 5-7 games to my coach and we go over them, followed by extra things I should study to improve my weaknesses. I also bring up stuff I have read, for example in How to Reassess your Chess to get clarification.

Is there anything more I can do to better utilize my coach?

Thanks!
I think you are making good use of your coach from the sound of it.  Perhaps you are not studying the correct books for your rating.  And you should be heavy on puzzles and basic endgames; if your coach hasn't pushed you toward that there may be reason for concern.