I have found a great blog that is old, PR6 site, has a high DA and PA and is ranked highly in alexa. Its a general blog so not targeted to my niche. Would you say its worth going for this? Also, my site is about a year old. Its been up the back burner so i have done no link building at all in that time apart from a pintrest page and a facebook page. All I have done is keep on adding content and its gets a decent amount of search traffic. All the backlinks I have to it are all pointing at internal pages but not the homepage. These are from people liking my content i guess. So my other question is, for this particular PR6 site should i backlink my main keyword? or should I like to the sites name or URL? I know which is safer but I want to start climbing in the serps. This will kick off my link building.