Stop spamming? You've really provided zero information, so it's impossible to give a useful answer, only a general one.
Regular work is best .Lot of work in less time or less work in lot of time is not good .Google always love high quality and user friendly work so all backlinks should be from authority sites and try to get more and more theme related links. So its time to move on with new strategy and unique work.....!!!
Remove/Replace crappy content on your site. Contact site owners with spammy links and ask for them to be removed or contact site owners and ask for the link to be changed. New Content Production: This is finding authoritative people that can produce great content and publish articles. Building community: Adding additional media types (video mainly) and more emphasis on social marketing.
1> Remove unnecessary pages 2> Remove low quality content 3> Remove duplicate content 4> Write quality content 5> Social media promotion
Please come to the quality of link building despite of just doing SEO: 1. Search Directories to Your Niche, Submit your site to them. 2. Search Forums to Your Niche, Submit your site to them. 3. Search blogs to your niche, submit your posts to them. 4. Do social media participation. 5. Take care of Yahoo Answers 6. Do Social Bookmarking to PR websites.