You need to display your ads correctly. Change them (if you havn't already) to blend into your site, make then look less like ads by removing the border and having the background the same as the background the ad is on. Also the 'large rectangle' is said to be the best ad unit for clicks, try wraping your content arround your ads and keeping them above the fold.
I started from 10 cents a day to more than a dollar a day. It's hard to get click on adsense but I never gave up. May be we all should keep on trying because if we work hard at it we can increase the adsense revenue.
I have even seen people making 10 dollar a month before and now they are making thousands per month.
I'm getting about $70-120/month mainly from my 3 biggest sites (tutorial site, arcade site, messenger site)
The CTR on the arcade and messenger site is crazy, but really REALLY bad payout.. Im lucky if i get $2.5 for 100 clicks. As for the tutorial site, which dont get that much traffic anymore, I can get up to $1 per click.
So for most of my sites, adsense doesn't seem to be paying off that well. It depends on what kind of content you're serving.
