putting the most visited content in a block
You could use the Drupal Most Popular module


  Showcase the most popular content across your Drupal website and
  engage your audience. Ready to Use
  
  The module is pre-packaged with several services including:
  
  Drupal - Most Viewed pages (using Statistics module) Drupal - Most
  Commented pages (from simple database query) Google Analytics - Most
  Viewed pages AddThis.com - Most Shared pages Disqus.com - Most
  Commented pages The system defines Drupal hooks to allow new services
  to be created, which can pull data from third party providers or
  internally from Drupal.  The system also provides an API to help
  service plugins normalize their results and exclude certain pages, as
  configured by the administrator.


or another module that you can use and its so easy is Radioactivity and there is a good video tutorial here