@Readyplayer - You should aim for a 32, not just a 30, and really prep for it . . . after all, a good score could be worth as much as $100k or more in free tuition and other costs!
Spend some time on CC’s [ACT Preparation forum](ACT Preparation - College Confidential Forums), and then work your tail off this summer doing practice tests. I always recommend focusing on one subject at a time until you’ve mastered it. Just do one or two 20-min. math sections a day, for example, until you’re comfortable with them, and then move on to something else. You don’t need to sit down and do an entire 3-hour practice test at one time - focusing on the individual subjects is much more useful. They should be able to give you some tips in the ACT forum on where you can find extra practice tests. ACT publishes a new practice test booklet every few years, and there are plenty of old ones out there floating around. They’ve probably all been posted on the internet by now - you just have to find them!