Hey, I want to master the new QS system that (I think) has brought down many affiliate marketers. Although I think my landing page is already good enough, but it seems my QS can't pass more than 5/10. I have money to pay for PPC personal coaching that teaches us how to make profit for affiliate websites. Can you recommend one?
PPC Coach is the best website for personal coaching. You should also think about reading The Definitive Guide to Google AdWords by Perry Marshall.
I think the two decent ones are PPC Coach and Wealthy Affiliate. Personally I'd go for PPC Coach, but if you can get your hands on it check out Wholesale Traffic for just a noob introduction to adwords and how to get or try and get a good QS etc.
I'm a huge advocate of mentoring and furthering your education! Good for you. As far as good programs, there are a few. PPC Classroom, and PPC Coach <---Not affiliate links. Are the 2 that I've heard the most about. PPC Classroom is actually being relaunched with all new training. Which is good cause Adwords is always changing. PPC Coach gives you a step by step process which is nice for those of us who get lost with TMI. lol Hope that helps!