The best bet is to check out your local community college. A lot of times they will have a one or two week course for like $350 which includes the test itself, which is like $150 per a test so the class ends up costing only $50.
Or get a hold of some practice test. A lot of the questions aren't how to plug in some parts but more of troubleshooting. So, unless you have on the job or hands on training troubleshooting you are just going to have to learn the text book answers.
Then again i took the A+ 10 years ago when it was mostly DOS and windows 3.11 and windows 95 questions, hahaha