Interstitial ads give the most money, they are full page ads.
Top banners pay less than Interstitial ads.
None (no ads) = no money

1.You can make money linking to any site, FB fan pages, (if you make alot of them) can make you money.

2.Youtube, Upload music and have the link for the download in the description.Or make tutorials on how to download stuff, hack stuff, jailbreak iphones, you name it, as long as there is adf.ly for someone to click in the description.

3.Torrent sites, upload a torrent, when linking to screenshots, use adf.ly (great if the movie/game you upload is new and has been advertised a lot).
or go to old cam torrents and comment and say get the dvd rip version/blueray here!(insert adf.ly link)

4.Your forum signature, its a neat way of getting a few clicks.

5.Yahoo answers, answer a question, in the sources..adf.ly it.

6.Omegle, chat rulette, go there chat to random strangers adf.ly your link say see my pic here...adf.ly (no porn).(i have not tired this)

7.Mail all your friends!

Simply put it, anytime you want to link something, adf.ly it. If it is somewhere on the net, it will be clicked sooner or later.
That wont make you a lot of money but i hope it helps.