I have just purchased a very successful website for a fairly large price, but it has been in operation for over 6 years and I don't want to ruin it's awesome rankings on Google. What can I change on the site without hurting it's current success? It is doing very well but I feel that this is mostly by accident, and some revamping of the site's content, methods, seo etc. would boost it's success ten fold cause there is lots of improvements that can be made. How much can change on the website without hurting the rankings it currently has for big keywords? Also, if I were to keep the website up to date and forward all users to a different site, could I utilize the traffic this way without affecting the site's rankings? Would a redirect on all pages hurt me with Google?