I'm currently taking the CompTIA A+ (I suspect that is what you mean by A+), only been taking it a couple of weeks so not passed it yet, my advice would be to keep looking over any study material and do some research related to the course, and perhaps look for some practice exams as suggested in another reply.
What can help also is if you have some experience with the topics covered anyway, given that I have an interest in computers to begin with and have built some of mine myself and repaired and serviced nearly all of them it puts me at an advantage, though, of course, there are things covered in the A+ that I didn't know myself.
If you are indeed taking the A+ I wish you all the best
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Thanks Tinkerbell.
Allegedly away with the fairies for 6-7 years