What is the most effective way to study for my TN L&H ex

I take my TN L&H exam in a week and I have studied constantly for this! However, I am not sure that I am thrilled with the company that my employer set me up through. I would come away from the lessons and not feel like I fully understood what it was supposed to teach me. Any suggestions, such as websites/flashcards/etc., would help!

Thank you!
aplantxo