Thanks all for your comments.
I have decided not change my domain, even it is not relevant or without any keywords. I will be focused on building brand for my blog.
I agree with Eugene with his clear example about Apple. Similar thing i would love to do with branding of my blog.
I have started marketing my brand by running print and online campaigns. I have started old style of branding near schools, coffee shop and big malls.
I think my strategies are working. Will keep updated on this thread. Thanks everyone