Honestly, just turn in everything on time. That made the difference of about 10 percentage points in some cases between me and all the other people in my honors classes. When you go home, do all of your homework immediately. I was done in 1-2 hours at most the majority of the time, and then I had the rest of the night to do whatever I wanted.
I hope you have fun this year! Some free side advice: I’m sure you’ve heard this a million times before, but don’t be afraid to try new things! Something I wasn’t even going to do going into high school (marching band) became one of the biggest parts of my high school life during the fall semester. If an opportunity to join a new club or organization that seems even vaguely interesting comes your way, do it. This is the best time to experiment.