What you think about when should start accepting guest blog post? Does it need PR ranking, min traffic etc ??
It is a fantastic way to boost traffic. I use this technique on most of my sites - many of which are authority niche sites. To get the best of both worlds, make sure to ask for a reciprocal link of some sorts. Most webmasters will be happy to do this kind of exchange. It helps to make friends in this world...even if you are selling the same things or monetizing through the same methods.
you can apply means when u get a good traffic you can do gust post on your blog and earn money $50 - $100 from the person whose you are giving the backlink..
Well to get quality articles as guest posts you should have a popular blog with high PageRank. Most guest bloggers want to post their articles on PR3+ with Alexa Ranking less than 100,000 so you need to work on this anyway you can search for guest bloggers on myblogguest.com and bloggerlinkup.com these are the biggest guest blogging communities on the net and you will find many opportunities there...