Working with multiple files in vim

There is a couple of useful commands that can be used to work with multiple files as tabs. I've mentioned them in a stackoverflow answer:
http://stackoverflow.com/a/14395583/612920

• Open a file in another tab
  
  :tabe filepath
 

• save the current session in order to be able to open the same set of files again
  
  :mksession session_name.vim
 

•  navigate between different tabs
  
  gt: next tab
  gT: previous tab
 

• close all tabs at once
  
  :qa
 

• open a saved session
  
  vim -S session_name.vim