The night before your permit test, you want to review all of your notes. Don't try to cram the night before your test. It's better to test yourself on the information you have studied and get a good night's rest.
For your NJ permit test, you should be familiar with the NJ Driver's Manual. Reading the entire manual will give you the best chance of passing successfully the NJ Permit Test. By the time you take your NJ Permit Test, you should be able to recall traffic laws and be familiar with all road signs.