Wow. Is that a joke? If it is not - please, tell me you are joking ?

Provide much more details.

1. You can target other relevant keywords to your site and do offpage seo with anchor text about these new relevant keywords.

2. Yes, I suggest you only place your best performing ad units on your site.

3. Of course...

You can target more keywords through SEO, and their are many suggestion about using CPC which service are you using?

Try facebook fan page. N also reedit. I got good success from that. Usually get a boost of around 100 more per day

How are you getting your traffic?

There are several ways to get traffic to your site, i will like to believe its through SEO. Here are two determinant factor when it come to receiving traffic from the search engines.

1. The amount of query your target keyword gets.

2. You need to be on the top first 5 of Google (SEO) that means you need sufficient quality back links than your competitors.

CPC will not decrease just because you placed three ad units.
You probably didn't make use of your keyword tool well, Google adword tool provides a rough estimate of the amount of visitors you should expect for every keyword.

How much you can make from ad sense is unlimited, the ball is in your court.

johnben1444>>

I am getting most of the traffic From search engines.. and Little from Social Media.

And i am not using AD filter( I just read this one Increase AdSense Earnings with Competitive Ad Filter : @ProBlogger)..Ad filter can increase My cpc ??

Thank you.

In this thread (http://www.warriorforum.com/adsense-...w-cpc-ads.html) There is a list of low paying Ads.

Its good for me to Block them?

People make use of competitive ad filter to remove ads
that compete with products on their website or to remove
unrelated ads.

I don't use that function that much because it diminishes
the amount of bidders on my ad sense site as well but you
might want to try and see the result. If it works for you in
increasing your CPC then great otherwise reinstate it to its
original form.

Read this AdSense Tips: Avoid Using the Competitive Ad Filter At All Costs

Another thing, I would recommend to check your position on Google with some tools such "Google Position Checker Tool" and try to add more content with more keywords for example.