How to Earn Regularly From a DR40 / DA45 Domain Name Plz

I have a dot com domain with SEO ( different from the domain given in my signature below ) in it. This domain name has DR40 / DA 45 status at this time.

How best should I use it for some regular income plz? Is creating a blog on IM / MMO on it and using it for inviting guest posts on it a good idea? Any better ideas?

Yes start accepting guest post. You can easily Charge atleast $50 per post with that domain. If you are getting traffic too you can charge more then.