This a question bloggers, like myself, tend to ask every time we think about monetizing our blog. I constantly go through a phase where I move my Adsense ads OR try out new systems like Adbrite or Bidvertiser.
No matter which ad system you are currently using, this little Ad “Heat Map” from the guys over at Google should give you a good starting point for ad placements.
I would recommend only using the Heat Map as a starting point, but as they mention on the Google Page, try to understand your readers. Don’t bombard them with irrelevant hawker ads. Always think about your readers first.
Red – Good Place
White – Bad Place
Ad Placement Heat Map
Heat Map
https://www.google.com/adsense/support/bin/answer.py?answer=17954
About Sarel Jan
great blog with very helpful content ,thanks