We all know it's not easy to add multiple new habits to your day. But what you might not realize is it's fairly easy to build a single new routine. The essence of habit stacking is to take a series of small changes and create a ritual that you follow on a daily basis. Habit stacking works because you eliminate the stress of trying to change too many things at once. Your goal is to simply focus on a single routine that only takes about 15 to 30 minutes to complete. Within this routine is a series of actions (or small changes). All you have to do is to create a checklist and follow it every single day.