Recommended Sublime User settings, you can access your own settings by going Sublime Text 2 > Preferences > Settings - User or pressing ⌘ + , Then add these to your preferences

Preferences.sublime-settings

{
  // This means every time you move away from your current tab it saves, no more cmd + s!
  "save_on_focus_lost": true,

  // Let's get rid of all those trailing white spaces!
  "trim_trailing_white_space_on_save": true,

  // A good idea to view all white space to make sure you're not using tabs
  "draw_white_space": "all",

  // This is the ruby default
  "tab_size": 2,

  // Set to true to insert spaces when tab is pressed
  "translate_tabs_to_spaces": true
}