I have a regional site in english language.Information about my local area of a Indian State.As we know if we want to get some backlinks to increase gud page rank then one of the best practice is to comment in other blogs or websites of SAME NICHE.But unfortunately in my niche there are some few sites are there.And on those site they have not provided comment area. So is it ok if i will commentn on other site of DIFFRENT NICHE ?I think in this case something is better than nothing.At least i can get some back link.But is it ok to put comment on diff niche site to get higher page rank?Please advise how to get back links more for my blog?If u have some help link then pls provide me here.