How can I earn $1000 per month?

First of all earning $1000 over internet in a month is quite difficult. But if you work hard you can earn even more. try bidding projects in odesk.com and freelancer.com and join affiliate programs. working in these sites require more and more hardwork. but i still cant guarantee that you can get $1000 but atleast you can make $300-$400 Per month.

I think it is next to impossible unless you have some special skill of making money.

In case you are willing to work hard, $1000 per month is 100% attainable, and not as hard as you may think. I would really suggest you to invest in a website (I mean your own one, it is really cheap), but not before having a pre-established plan that you can easily follow. CPA networks and affiliate marketing programs tend to be high earning ones especially when you have a website, where you can promote them. Prior to going on this route though, be sure you understand and know how to effectively use SEO, and gain some knowledge about the monetizing techniques you will use like the above mentioned affiliate marketing, CPA or mailing list building. Also, do not fall into the mistake of purchasing guides written by IM "gurus". They usually only contain common informations that you can also easily figure out on your own. On the other hand, an automation software like SEnukeX can be very useful, however you will be fine without it until you reach your desired 1k per month.