This is a common problem > product pages ranking instead of landing pages (or category pages). There's no silver bullet, but a few tips I can give you.
1. Make sure the landing/category pages is optimized with lots of unique content. A category page that simply links to products is going to have a hard time ranking post Panda. This means unique text, photos and external links.
2. Make sure your product pages all link back to the category/landing pages with proper anchor text. Breadcrumbs at a minimum.
3. Link your category pages to other category pages
4. Optimize your product pages for the most unique thing about them. Instead of "Brand B shoes red size 11" optimize them for "red shoes, size 11, brand B"
Keep going in this direction and you get the idea. Cheers!
What I do care about is how users engage with those activities, how often my content is shared by authoritative influencers, and how these activities contribute to SEO success.