must learn more, read the adwords forum on webmasterworld and on googles website.
Setup a adwords account yourself and learn the system. Target the content network, see what advertisers are striving for.
It's not a accident that the default adsense color is bright blue.
If you were the adsense algo where would you send the highest paying ads?
Site 1 has 2000 clicks per day at 200 conversions
Site 2 has 300 clicks per day at 200 conversions
Which site would get the best inventory?
Which site would advertisers get into bidding wars over?
Im not a newbie, Ive been using adsense since it came out of beta on multi million page view a month websites to niche 10k pageview a month websites. These are just my findings after tens of thousands of hours of work and research.
What folks do with it is up to them.
Judging from my competition, several must have read this thread. 3 of them are bright blue after 6 years of matched.
This may or may not help you, example would be if your traffic is just low quality when it comes to conversions. Then you would need to focus on morphing your content more.