I know you are aware of the need for traffic to your Adsense
sites if they are to prosper, but is just getting traffic enough?

Read my experience about this:

I have one AdSense site I created early on in my Adsense career
which gets fair traffic now but makes little money. Google
analytics tells me that about 80% of the visitors remained on the
home page less than 10 seconds. Maybe they navigated to one of its
other 10 odd pages? I checked those too; they weren't getting much
traffic at all. Since I was not getting many clicks, visitors were
OBVIOUSLY clicking the BACK button and not the ads as they left the
page in 10 seconds.

I admit the site is not one of my proudest creations, but 10
seconds...or less?

Of course this answered the question for me as to why there were
few AdSense clicks even though there was decent traffic. I WAS
driving traffic to the site with Google, Yahoo, and MSN; Google
analytics showed me that. (By the way, I HIGHLY suggest you put
Google analytics on your sites...it doesn't cost a thing and provides
you a wealth of information you simply NEED to know!)

Yes, I had done well with SEO in getting traffic, but I neglected
the human element for the site. Far too many people (me too in this
case) create a site with the search engines in mind and forget that
search engines DO NOT CLICK THE ADSENSE ADS!

If your site is not compelling enough for a visitor to spend more
than 10 seconds on, they sure enough are not going to be clicking
the ads! Your goal, when it comes to traffic, has to be two fold:

-First and foremost, you must drive traffic to the site. No
traffic - No clicks...pretty simple. While I am on that topic I want to remind everyone
NOT to fall for the many scams out there many of you fall for when building your sites.

-Secondly, the content must be attractive enough for visitors to
hang out for a while. Somehow, someway, you must capture their
attention. You must draw them in...give them what they came looking
for when they searched for and found your site! (read that again!)
If you perk them up with content they find helpful, interesting, or
just plain cool, you'll have them wanting more. THAT is when they
will click your ads!

Search engine friendly sites attract traffic. Human friendly niche
sites deposit money into your AdSense account!