It doesn’t work. Commenting on other blogs will get you helpless nofollow backlinks.
#1: Guest Post on other Blogs.
#2: Write quality content.
#3: Create a forum/app/a too that’s unique and that adds value. This way people will link to your blog when trying to direct users or customers to the tool/app.
#4: Host contests (writing contests or something that’ll pull the crowd).
#5: Advertise your blog on one of these very popular TV channels. It’s expensive but the millions that’ll go running to your blog will blow your mind. Make the advert very catchy while emphasizing on the value your blog provides, and emphasizing on how that value helps.