Please go here: http://www.talimiboardkzn.org/Books/...of_tajweed.pdf On pages 16-17, there are rules of waqf (stopping). You can also buy "simplified rules of tajweed" from any bookstore or there may be an online copy. That should help you, inshaAllah. I also suggest to go to a quran teacher to help you understand what you read in different tajweed books and also to help you apply those rules the right way and test you to see if you are doing it correctly.