Quite a few people have been affected by the recent Google algorithm changes. Times have changed immensely since I first started working with search engines (anyone still remember HotBot and Alta Vista?). Things that once worked back in 2005 can now have a dramatic impact on your website if those methods can still be found.
Not only do you need to avoid low quality backlinks but you need to be sure those back-links are not still linking to you now. So how can you work on your off-page SEO correctly?
This infographic by business2community highlights some great tips for better off page search engine optimisation