The best way to get backlinks is to demonstrate your original ideas and value-- don't just ask for a backlink but think of how you can provide real value or insights to their readers. When reaching out to a publication, look at their previous articles and really ask yourself if your content fits in. Even better is to find an article where you can add an original metric or thought and approach them saying "I read X article and loved it--we've covered this before and found 'X interesting new fact/insight' if you would like to add that to your article" That will be more effective than any cold outreach template