Have you used one of the commercial exam preparation courses to get ready?
I used one, and it worked for me. Passed first time, and I would'nt have passed the law/business/safety exam without it. And it made the trade exam easier.
There's so much stuff on the law/business/safety exam, I can't even suggest where to start except with one of the info books and practice tests from one of many exam prep companies. For the trade exam, take Mike Holt's exam prep questions. Mike's questions are similar in difficulty and detail to the ones on the Calif exam.
If you need them, I have the full set of four books (two information books and two practice exam books, one of each for the law and the trade), plus a cassette tape on safety and a set of six audio CDs on the law. From Accelerated Learning Systems. The stack of books is about 3" thick, and I paid $380 for it. Will sell for half that.
I went this route rather than pay for a course where you have to spend several Saturdays taking practice tests at some classroom to get ready.
Good luck on the exams.