What would be the best way to keep on holding the current SERP position and prevent it from sliding down the hill....
You have to keep building authority to it by posting unique content and building relevant links as well as keeping very close watch to your competitors and outdo what they are doing as far as SEO.
keep on getting links to that particular webpage. It is impossible to have every single page ranks top in google. The best you can do is to protect the SERP of the top page.
So you guys mean to say keep on building backlinks to that specific page ? will my site be sandboxed doing so ?
Maintenance of a website's high PR involves: 1. Keeping up-to-date any major links; 2. Continue to refresh any relevant articles, and hard copy text.
The best and properly measured way to get hold on the SERP ranking of the search engines by producing quality blogs postings and social bookmarking.
Update your content on regular basis and increase your backlinks. Try to get backlinks from those websites who has good position for your targeted keywords.