Which AdSense ads, sizes and positions work best for you on website articles and forums.
My earnings have really been dropping in the last couple of months, not sure why. I've been experimenting a little and it seems that every time I take away 160 x 600 skyscraper located in the left-hand column above the menu, my earnings to tend to suffer. I've tried a skyscraper in the right-hand column and I get absolutely nothing. But I've seen a lot of people putting ads in the right side column and they seem to work for them, not sure why it doesn't for me.
Placing an ad unit at the very end of my content has always been a good earner. I'm now experimenting with both 728 banner, and a 300 rectangle.
I have also been trying a 728 x 15 text link just on top of my content, underneath my social buttons, that doesn't seem to get much attention either.
I think I've tried most positions, but it would be interesting to hear other people's configurations, maybe there something I've missed that I could give a try.