Help for ACT prep and studying?

I received a way lower score than I thought I would get on the ACT. I received a 22 when I was shooting for a high 20s. I think it was a mentality problem, I have never really been a good tester so I decided to not do anything besides a one night prep cl and just go in and take the test hoping that if I wasn't nervous I would do better. I now realize that was a horrible mistake because I should have scored at least a 28. What books should I use for prep? Does anyone have just some test taking tips? I need a lot of help and HAVE to raise my score because I only have one more chance to retake it. Please help, I could use some recommendations. THANK YOU!