Have a duplicate URL, should I do anything about it?

My wordpress site has /author/admin which lists the posts I've posted, which is identical to the front page.
Is there anything I should do? Or should it be okay since front page will get all of the attention anyways?

You don't want duplicate content ever.

I would advise you 301 the duplicate page to the home page (as long as its a static url)

thats the easy way to do it, if you can't do this (only reason to be will be a dynamic url) go into the theme and edit out all links to this page or delete the child template for that page.

Just noindex the /author/ directory in the robots.txt file.

for any wordpress website i will better use in my robots.txt
Disallow: /cgi-bin
Disallow: /wp-admin
Disallow: /wp-includes
Disallow: /wp-content/plugins
Disallow: /wp-content/cache
Disallow: /wp-content/themes
Disallow: /wp-trackback
Disallow: /wp-feed
Disallow: /wp-comments
Disallow: */trackback
Disallow: */feed
Disallow: */comments
Disallow: /author/
Disallow: /tag/
Disallow: /category/

If problems arise use 301 redirection.