I would like to do SEO for my blog. Can anyone suggest a good person/organization who can provide the reliable service?
If you own a medium sized blog, I would suggest you do SEO yourself. You can check this tutorial for a basic idea:-
You can do SEO yourself with some good tools and a little bit learning. Take a look at some good seo tools list:
There are some articles for basic learning:
But if you are not confident doing it yourself you can hire some professional at Fiverr.