Rankings Down - Need On-Page SEO & Input 500 Meta Tags

I have website that my family and I sell about 500 bedding products on and it's my familys' sole-source of income. The recent Google changes decreased our rankings badly and we don't know what caused it. Since the beginning of March, sales and visitors have decreased by about 60%. We made no chages to the site for many months before the ranking drop, whick makes believe it's either a on-page SEO problem and/or the value of our backlinks has been seriously discounted, resulting in the drop. Our drop this year is the worst I've seen in 8 years of running websites. For search queries with medium competition, we sank from page 1 to pages 2, 3, & 4 We don't rank at all on Google for more competitive phrases, and if we do rank, it's somewhere near page 40 or so. -Competitive Search Queries We Ranked #1 for on Google In Last Few Years: "bed sheets" - [login to view URL] "bedding" - [login to view URL] "flannel sheets" - [login to view URL] "bed in a bag sets" - [login to view URL] "olympic queen sheet set" - [login to view URL] "full xl sheets" - [login to view URL] "extra long full sheet set" - [login to view URL] "king beding" - [login to view URL] "queen bedding" - [login to view URL] "extra long full sheets" - [login to view URL] "waterbed sheets" - [login to view URL] "hard side waterbed sheets" - [login to view URL] "soft side waterbed sheets" - [login to view URL] "deep pocket sheets" - [login to view URL] "extra deep pocket sheets" - [login to view URL] Historically, those our our hottest products and we need them to rank like before. - Steps to Increase Sales for [login to view URL] 1. Link Building: I hired the best white-hat Link building guy on FreeLancer right after the Google drop. Since then, I have been woking 16-hour days improving the site and trying (my best) to get traffic back up to where it was. I optimized some on-page stuff as best I can (except meta tags). We've been writing articles and submitting the to article sites: Please see the three attached Excel files to see our current link building campaign, or visit this link for all the details: [login to view URL] 2. Major website improvement, fix search fox, speed optimization 3. Meta tag info, each as unique as possible for both products and categories. 4. More data on the product detail and category pages that don't have enough text. 5. Focus on phrases on page 2 of Google (See: [login to view URL] ) Most SEO pros can fill in meta tags for a product page. That's easy, especially when you copy and paste the data. That's not all I am looking for. The candidate for this position must fill the META tags for both SEO and to appeal to the users of the site. If you are hired, I will give you access our Google Analytics and Webmaster Tools accounts to find out the best phrases to use in the meta tags and non-meta product page summaries. This should ensure PB gets good rankings when people enter the most common phrases for our products. Some product summary txt will need to be altered slightly to match the phrases people are looking for when they search. I'd also like the candidate to do an analysis on our website to determine if there are any on-page factors that might be holding us back. Whoever helps me get rankings up will get a nice, fat bonus. :)