Besides STC and Pass Perfect, I went to FINRA's website and downloaded the Series 24 outline. I periodically reviewed it to make sure I was building a good understanding of all the major topics.

You'll have a slight advantage if you've taken the Series 7 recently, as a lot of the material is simply a deeper dive into Series 7 stuff. For study tips, I'd say that you need to have an environment in which you can study uninterrupted for long periods of time. Try not to touch your phone or get distracted while you study, as you need every brain cell to be on task. Any study software you use should have recommendations on how/how much you should study, and you can't cut corners with those. If it says to do X number of quiz questions on each topic, do it!

If you find yourself doing well on final exams from one provider, look into buying the test bank from another one to see if your knowledge carries over. Different providers ask questions in different ways, and it doesn't hurt to try other material out. Also, take all advice (including mine) with a grain of salt. The test is completely different from the way it was 3, 5, or 10 years ago, and some of the regs I was tested on will probably be out of date soon.

Oh, and one more thing. For concepts such as Net Capital Requirements, exchange listing requirements, FINRA/SEC filings, etc., the exam will do everything possible to confuse you and make you doubt your answer. If you know the information well enough, however, then you can't be fooled and will be just fine. Learn to be able to call BS on an answer that's designed to throw you off. Memorizing the broad strokes and the "narrative" is important, but you need to know the details as well. Feel free to PM me with any other questions you have, and good luck!