Do you write your blog article, then switch to Facebook and write it again and then log into Twitter to publicise either of them concluding with the addition of a link?
Want to do it only once?
Add the Social plugin by Mail Chimp to your WordPress website and broadcast an article at the push of a button.
You can publish to more than one Facebook or Twitter account if you wish. Just add them to the admin page.
Enough time saved for another cup of coffee