Nice post, bud. +rep. Whether or not it is elementary to most, as someone else mentioned, by occassionally being reminded of fundamentals you can steer yourself back in the right direction.
Perhaps you are getting to bogged down analyzing your PPC campaign, and you are neglecting your content and sales copy. There are many different examples of how taking a step back and rethinking the ENTIRE project can be VERY helpful.
I am having a somewhat hard time getting enough good keywords into my sales copy. If this is what EFUT was referring to when he said that sales copy is terrible for SEO, that is funny. It's more like if you are writing sales copy it can be difficult to make rich content with good keywords (not overstuffed). Basically, it comes down to being lazy and not taking the time to develop your content.
I just finished my sales copy for a new niche, and I can honestly say that this is probably its 10th draft before I settled on good copy. Yes, it is tough to write good sales copy. But with practice, and a solid grasp on the fundamentals that images rehashed, a happy medium can be struck between keyword density, believability and convertability.