I’ll find keywords that your competitor doesn’t know. People usualy use Google Keyword Planner in a competely wrong way, just by typing keywords in it. GKP gives the same results to everyone, even to your competitor.
I hack the Google Keyword Planner to find the unique list of Potential KEYWORDS that i doesn’t show the most people. What I do is simply copy the link of your competitor and pasting it in GKP. As a result, it gives us a UNIQUE list of LONG TAIL KEYWORDS.
Because these are keywords most people never see, we can easily create targeted articles or landing pages around them and rank those pages without needing a lot of backlinks.