How to find the Do-follow niche blog for blog comment?

Hello experts,

As I far i know, blog-commenting is a good approach to get good quality links from other websites. Moreover, do-follow links are good fora website ranking too!

I am new in this field, I do not know how to find the do-follow blogs on a niche. Can you suggest me anything that can help me?


Poster :
Shahidul Islam Rakib