AdSense, selling text links on my website, designing websites & banners for people. You just have to build up a high-authority website then you can make lots of money with it
By link sales... Just I'll start a blog and posting will be done daily. I will do SEO and will get descent PR. Then will sell the links for quite good money. I have started a blog couple of months before. Now selling links as I got PR-2.
I've had all of my minor success with WidgetBucks and Adsenese. Of course, I've only had my site for about 2 weeks and the revenue isn't exactly rolling in, but its something.