This is very useful to make Sublime Text 3 switching tabs by cycle order (not by stack). Put this in your User keycap file (Preferences → Key Bindings — User):

  { «keys»: [«ctrl+tab»], «command»: «next_view» },
  { «keys»: [«ctrl+shift+tab»], «command»: «prev_view» }

Seeing the code listing is «typographically formatted»? Oh, it’s ok. Don’t copy-paste anything from web! Write your own code :-)

By the way, I found good Sublime Text’s settings tutorial for beginners.

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Also, the best way to use todo-lists in Sublime Text is install the PlainTasks plugin. Look demo. It needs Package Control plugin to be installed on Sublime Text.