15 minutes = 1% of your day.
What could you do for 15 minutes every single day for the next year that would have an immense impact on your life?
One percent. Can you dedicate one percent to that activity?
How about two percent? Three? Four?
30 minutes = 2% of your day.
45 minutes = 3% of your day.
1 hour = 4% of your day.
You probably spend 24-32% of each day sleeping.
What are you doing with that other 70%?