I'm getting this error message when activating the Contact Form plugin

I've been told Notices can be ignored but these messages become confusing when I'm trying to troubleshoot other problems using DEBUG:

[30-Jan-2015 02:22:42 UTC] PHP Notice: wp_enqueue_script was called incorrectly. Scripts and styles should not be registered or enqueued until the wp_enqueue_scripts, admin_enqueue_scripts, or login_enqueue_scripts hooks. Please see Debugging in WordPress for more information. (This message was added in version 3.3.) in /home/oceandig/public_html/wp-includes/functions.php on line 3547