(1) I cleaned the website from minor and major issues like deleting links that were not working properly, deleting any plugin that was too much for our readers, used simple URLs for each article, set up all SEO metrics including Focus keywords and SEO description (even alt. description for pictures) even for articles from 6 months ago.
(2) Asked all our 60 authors to use their Google Plus ID in our profiles and change their Google Plus profile under "contributor" section to get Google Authorship for all of them (which only 30% of them did that)
(3) Did an overall analysis everyday to get Trending Topics from Google Trends and also alternative words for each hot topic and asked the Content Manager to replace some words from the published contents based on my daily analysis.