There are many ways to prepare for this test and believe me that my mom has made me try every single one of them. But throughout all that I have learned that there are 2 things that will ensure you are prepared for the test. The first one is taking classes on ACT test taking that will let you look at a previous ACT so you can see what is on it. They helped me plan out how to take it and how to organize my test.
The 2nd method I have learned is reading from a book of Tips and Tricks for taking the ACT. They give you helpful little "cheats" in a sense for test taking which I found to have extreme value. Out of all the things I have done to prepare for this dreadful test these 2 things were the most helpful and I hope they can help you too.
https://www.youtube.com/watch?v=8euL7Z8FVL4