I'd focus on getting your site right before you worry about anything else. At the moment it looks like a bunch of articles copied from other sites with not real plan, genre etc. I could be completely wrong, but that's how it looks and that's your first job.
1. Why do you want to increase it for? DA is a useless metric that NO search engine uses in their ranking algoirthm 2. DA is based totally on the number of link to the site (NOTHING else is used in the DA calculations) 3. The site is poorly written dribble with really bad grammar, so you should have greater priorities than be concerned about DA (Threads on DA usually bring out a lot of clueless idiots who have no idea what it is and how its calculated.... so bringing out the popcorn for what ensues)
Easy Way To Increase DA Create Lots Of Linkable Content Develop Strong Internal Linking Remove Bad And Toxic Links Create High Profile Linking Promote Your Content Social Media Sites
get some do follow link form high authority and high DA site and let the traffic flow form there it will pass the link juice form their website to yours and will increase your DA guest posing,forum posting and web 2.0 creation works better for this, don't forget to create a quality content for your web 2.0
Apparantely, your site is ranked 333,818 in the world and 20,029 in India according to Alexa which is pretty impressive I must say. Just curious, how much traffic and revenue are you getting on a monthly basis?
Try to get links from sites which have higher DA in your niche. Do not try to get links from any website and try to comment on high authority websites.