How to improve my basketball game over the summer?

I'm a freshman...next year (2011-2012) I'll be a Sophmore. Right now i have a lot of talent and I was the leading freshman scorer in our conference and 9th leading scorer over all. But, I never really work on my game. I'm fine with shooting around but i never really do any drills. I want to improve a lot this summer. I want to become a much mor eknown player so I'm wondering if I should hire a trainer if that is neccessary or should I just work on my game by myself.