Friend, if you do research of good 100 Keywords and daily put 1 article on your website with those 100 keywords. You can make a pretty good bunch of content for Google Adsense to serve higher paying ads on your website.
Do note, the content should be worth quality + unique. Also, you should build some quality links to your website, put some social bookmarking efforts, and you will see gud increase in your traffic.
If those 100 keywords get you 10 visitors each, you can end up with 1000 Visitors a day, and if you get 20% CTR, you can make 200 Adsense Clicks daily, and so if the keyword is highly saturated with Adwords Advertisers, you can end up making more than $250 daily.
I think, thats good residual income daily...
thanks,
FutureEXPERT
Google Riches & Google Money Master are Money Makers.