What is your niche all about? Use Google Keyword tool to search proper keywords for your website. List down keywords which has high volume search with low competition level both are important factors to consider for keywords research.
It really depends what you are actually looking to do with the domains. There's no point focusing on arcade game keywords for your 24x7 fun domain if you are intending to build it into a video sharing site.
I only see a basic blog on that domain at the moment - what are you intending to do with the site?
To be honest...I wanted to sell both domains, but don't know what to do or how to sell them...So i parked both the domains on seoparking with blog and google ads on it...
One of the best solution to get keywords is by using keywords tools. Most of search engine has their own keyword tools. It's an automated process to get keywords. Google keyword tool is most popular tool and easy also. So please check your keyword with your niche in it.