You sound like someone I know, but I can't place it...
My basic theory is this: in Autumn, you learn new skills. You experiment. You try on new lifts. As a thrower, you need to do the Olympic lifts (I won't even discuss this...do them), so you might want to consider now doing Power Snatch and Overhead Squats as a basic exercise. Sets of five will kill. Soon, sneak down lower and lower and try to squat snatch them.
Small note: my first attempt on the Overhead Squat was with a heavily weighted bar on our old green porch. I dumped the weight and got wedged between the wall and the incline bench. Dad had to pull it off of me. He wasn't pleased.
I would also put together several 1-2-3 workouts with the implements. Like in the javelin:
2-handed med ball throws feet together.
2-hand med ball throws throwing stance
2-hand med ball throws one step
2-hand med ball throws two steps
2-hand med ball throws three steps
Then, one handed (either med ball (small one) or turbojav or whatever).
Outline all your throws like this...