There are a lot, if not too many, threads about declining CPM's. This thread is not about that. It is more a question to those with stable or incsreasing CPMs in an attempt to understand their methods.

For those that have a steady or even increasing CPM (over a reasonable period) what tips do you have?

Do you block any CPM ads?

Do you have a lot of site targetted ads?

How do you stop one ad from appearing on every page?which should/could mean a lower CTR due to ad blindness (especially if you have a lot of repeat business)

I have a lot of site targgeted ads good high daily impressions yet still the CPM seems to decline. I find this strange as logic would dictate that the more advertisers site targetting your site, the higher the CPM as they compete to appear on the site.

This is a concern for me as I have lost good quality direct advertisers to Google AdSense and consequently important revenue and eggs in different baskets.