Adding new site and putting more content to the existing sites both are necessary to increase your earning. I want to suggest you adding high CPC keywords sites may more help to increase your earning.
I definitely recommend putting your eggs in more than one basket. Go for building another site. I spent a load of time on one site for the last several years trying to push up my income level, when it would've been easier for me to build new ones.
Find good keywords. Write quality content. If you don't good at writing article you can buy from other service (Fiverr.com). Build Link : 1. Forum post 2. Forum profile 3. Blog comment 4. Article Marketing 5. Social Bookmarking
Tis an interesting one. I've swung between $200 and $450 a month over the last year and I couldn't honestly tell you what makes better money. Some days you get $30, some days $2, same site, same keywords, same traffic, different adsense money. Three sites make the money and they aren't consistent, one can make nothing for days and then suddenly have a run of $10-15 clicks and then back to making nothing again. Have a new site launching soon, guess we'll see how that goes. Meantime, the day job pays WAY better than I think adsense ever will. Adsense is just nice pocket money.
increase your page views & get visitores from targetted countries & automatically your earnings will rise
The best way is by increasing page views. you can do it by adding some additional quality in your existing site or buying a high traffic existing site.
There are lots of factors that comes to play when it comes to making good income from adsense such as Niche - some niches are more profitable and people are very likely to click the ads than others. Site layout - You need a converting site or blog or your click through rate will suck. CPC - The cost per click has to be relatively high thou not too competitive. Adsense format - From my experience different niches require different adsense format. The secret here is to experiment and see which one works for you.
If you love what you are doing, you will reach your goal. That is the natural consequence. Don't work just for money, but for public service and of course for your passion.
Use good adds placements on your existing sites by viewing the hotspots of your site and placing the adds there to increase clicks and revenue aswell !
Thats right, you may wanna play with your ads if your traffic is doing good, you may have something wrong with ur ad placement.
You have more unique contents, domain's age is old, many visitors per day, high rank, always note google's TOS, you will have more money.
I have been working since 2008 on some websites, but my earning is very low yet and I don't mind what is earning because I will be working continue and I believe that I will earn better than past earning.