Site looks too close or cluttered. I think there is too much ads modules. It will be better let more place for the helpful information. It is possible, for example, to reduce width of sidebar Vadim
Optimization of a site is a infinite process and at the right method of approach always useful. But on the rendering in Google most strongly effect give an increase of backlinks amount. More shortly - Backlink runs the show!
+1 for removal of a few categories, it looks too informative, and thus a bit chaotic. I'd also suggest to modify a logo a bit