Originally Posted by inertia

A customer of mine had dropped 5 places for their main key phrase. The page that had lost the positions was in content manager system and despite us insisting he doesn't copy and paste directly from word - this is exactly what he had done. As a result there was masses of unnecessary coding and none of it was structured with H1, H2 etc.

I removed as much of the coding as possible and structured the content appropriately. Within 2 days his site was back on the top spot. This was the first thing i tried and it seamed to do the trick. Whether it was down to me tidying up the coding or just coincidence i will let you decide...