

This article is an excerpt from the Shortform book guide to "The Science of Self-Discipline" by Peter Hollins. Shortform has the world's best summaries and analyses of books you should be reading.
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Do you give in to impulsive behavior? Do you know how to gain self-discipline?
Peter Hollins, the author of The Science of Self-Discipline, has a variety of internal strategies to improve your discipline in the long run. By becoming more self-disciplined, you’ll be able to endure the distractions life throws at you and steadily progress toward your goals.
Let’s look at how to gain self-discipline with these emotional and logical tools.
Develop Internal Discipline
It’s possible to improve discipline through practice, but you must also be careful not to overdo it. So, Hollins explains that taking a measured approach to developing discipline will make it sustainable. In this article, we’ll discuss Hollins’s emotional tools to learn how to gain self-discipline, as well as logistical strategies to help you build disciplined habits.
Emotional Tools to Build Discipline
To develop a disciplined mindset, Hollins offers the following strategies.
Find Your Reason to be Disciplined
According to Hollins, if you have a clear idea of what you want to achieve through discipline, it will motivate you to keep your healthy habits on track and persevere through challenging moments.
Hollins explains that there are three main categories of motivation: independence, excellence, and service. A motivating goal will relate to at least one of these categories.
1. Independence: This is a sense that you have the freedom to decide your actions. When you feel in control of your life and work, you’re motivated to be more engaged and productive.
2. Excellence: This is your innate desire to improve at things. When you feel motivated to get better at something, there’s practically no end to this drive because it’s impossible to be perfect at anything.
3. Service: This is the idea that your discipline will have a meaningful effect on the world. For example, if you believe that the smoothie shop you’re disciplined to save money for will bring joy and nutrition to your community, you’ll probably be more motivated to follow through with opening it than someone who is opening a business solely for personal profit.
Don’t Fight Your Impulses, Observe Them
Hollins says that if you fight your urges, it makes them last longer and grow stronger, which puts you at greater risk of succumbing to them. You probably already know this if anyone’s ever told you not to think about something. When you try to suppress a thought, your focus on that topic typically grows stronger. So, instead of suppressing your urges, allow yourself to experience them with an awareness that they’re temporary. Hollins explains that this will help you stop identifying with your emotions and give you a position of power over them, which allows them to pass more easily. One way to do this is to picture your urge as a passing storm that comes on strong and then fades away.
Remind Yourself That You’re Capable of Maintaining Discipline
Hollins emphasizes the importance of believing that you’re capable of maintaining discipline to reach your goals. To affirm your strength when you feel weak, remember these tips:
Practice the 40% Rule. Developed by Navy SEALs, this rule means that when you feel like you’ve reached your physical or mental limit amidst a challenge, you’ve only exerted about 40% of what you have left in the tank. The 40% rule is supported by evidence for the placebo effect, which is the influence our beliefs have on real-world outcomes. If you believe you have what it takes to maintain discipline—even when it gets hard—you’ll find the willpower to keep going.
Remember the progress you’ve already made. By giving yourself credit for how far you’ve already come in your journey to your goal and taking inventory of the ways you’re capable of achieving your goal, you’ll empower yourself to push forward.
Consider Your Future Self
Hollins suggests that you can delay gratification to gain more in the long run if you identify with your future self. When you realize your future self will reap whatever seeds you sow in the present, you’ll be less likely to give in to fruitless temptations. Consider how your future self will be able to enjoy relaxation and fun more wholly when you know you’ve already accomplished the things you were supposed to. If you don’t do what you’re supposed to, you’ll likely be stressed about it.

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- Why changing habits takes far more than creating a routine
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- How perfectionism holds us back from risk and success