I think having a large physical calendar works better for some people, but there are many excellent apps for using this technique too.

Web:

http://www.joesgoals.com - http://www.42goals.com/ - https://chains.cc/

Phone Apps:

Streaks: https://itunes.apple.com/us/app/streaks-motivational-calenda...

(Free) Goal Master: https://itunes.apple.com/us/app/goal-master/id347105327?mt=8

http://wayoflifeapp.com/