May be some of you already know this, but if you do not know, read it:
If you have a Facebook fan page of your blog and you would like to add a like box of that fan page in your blog, then
Go to your Dashboard -> Appearance -> Widgets
Among the available widgets, you will find a widget called "Facebook Like Box". Simply drag that, put the address of your Facebook fan page, determine the width, and you are done!
The blog I need help with is theshardulofallah.wordpress.com.