how many hits per day is a lot? 50,000?
do you rotate your galleries daily?

take down all the banners - use text links only. and the worse they look - like those 3 buttons and 1 banner on the top - the LESS sales you'll make. this is NOT a case where having more = more money. having 4 banners one on top of another is a great way to make less cash AND less bookmarkers.

pick better thumbs. i said it before, but this is essential. almost every thumb you have up there is bad. surfers leave sites with bad thumbs, and the thumbs put them out of the mood to buy. you cannot use oversharpened thumbs. you cannot use blurry thumbs. you need thumbs with interesting subject material.

choose quality galleries. whether they are submitted or fhg's or your own galleries, bad galleries will cost you bookmarkers and sales.

pay a designer and host your own galleries if you're really serious.

the bottom line is what i said to you before. tgps are a lot of work and require a lot of knowledge which you don't have. change your tgp to a review site - there's MUCH less work and much less knowledge needed.