I have tried different methods but I am still not sure what is the best way. The one I am using so far is getting the keyword I want and searching in google, "keyword". Then with those results, I check the Moz results for the top 3 with the tool bar extension in chrome. If the top three results have low PA and DA I check their backlinks profile. If they don't have backlinks or backlinks that are not contextual, with anchor texts that resemble the keyword, I go for that keyword. Is there a better way? Thanks in advanced.