I was going through an old blog of mine that still manages to gather some traffic and I was wondering if the time was right to start it up again and see if I can take it somewhere. However, all the content on there is now a bit older, out of date in some areas and so on - but I was wondering, is it possible to update that content, rewrite some parts, update the links etc. and still retain all that SEO juice that's already being delivered to it? I of course don't want to lose out on what's already there so I was wondering if there is a specific or 'proper' way to update old content and retain what's already there?