Just a quick thing I have noticed from backlinking a lot of sites in the last couple of months. We all know that you should diversify, switching up the anchor keyword with "click here" "visit site" etc... What I have done on a lot of sites lately is this. Lets say I want to target the keyword "Nissan GTR4". I will build links with a lot of variations with the original keyword in it: Sky blue Nissan GTR4, Red Nissan GTR4 for sale, Nissan GTR4 on sale, cheapest Nissan GTR4 etc etc... I don't switch it up with "click here" and stuff like that anymore. I rather do it with the keyword in it "Click here to check out the new Nissan GTR4". It is working great for me. Not groundbreaking stuff but for a couple of noobs who are questioning about keyword diversity, just throw your keyword mixed with other related words.