The amazing thing about the Adsense advertising system is how one simple change in positioning of your ads can have a profound impact upon the earnings you receive from it. I still remember a fateful night about 8 months ago when I learnt this lesson and doubled my income overnight (no this isn’t one of those posts where I’m selling something - relax). It was 10.30am and I was about to head to bed when on a whim I decided to shift my Adsense ads from the position that I’d always had them at the top (banner position) of the blog I was working on...