Leverage a principle from Peter Drucker: identify categorical decisions that eliminate entire classes of future choices. Instead of managing countless small decisions, make one sweeping rule (e.g., no new books, no public speaking for a year). This single choice removes thousands of subsequent decisions, creating massive mental space and clarity.

People fail at new goals because they treat their time and energy as expandable. The first rule is that to pick something up, you must put something down. Create a "subtraction list" of activities to drop to make room for the new "addition list."

Shift your focus from achieving outcomes to building an identity. Each time you perform a desired habit, you are casting a vote for being the type of person you wish to become. This identity-based approach fosters intrinsic motivation that is more durable than goal-oriented motivation.

Instead of optimizing a hundred small tasks, focus on the single action that creates the most leverage. Citing Tim Ferriss, Dave Gerhardt uses this question to identify the core task that, if completed, would simplify or eliminate many other items on the to-do list.

Instead of setting multiple, often-failed New Year's resolutions, focus on installing just one new positive habit per quarter (e.g., meditating 10 minutes a day). This slow, steady approach leads to four foundational habits a year, which compound over time for transformative results.

The most powerful way to make habits stick is to tie them to your identity. Each action you take—one pushup, one sentence written—casts a vote for a desired identity, like "I'm someone who doesn't miss workouts" or "I am a writer." This builds a body of evidence that makes the identity real.

Instead of building many habits at once, focus on one or two 'upstream' ones that cause a cascade of positive effects. For example, exercising regularly often leads to better sleep, improved focus, and healthier eating habits without directly trying to change them.

Instead of adding more goals, use a three-part filter to audit them. A goal must support your nervous system (peace), meaningfully advance the business (profit), or align with your desired impact (purpose). This ruthless audit eliminates energy-draining tasks that were never truly yours.

Adopt the Japanese ritual of "misogi" by choosing one significant, difficult challenge to define your year. This singular focus ensures you have a monumental accomplishment to look back on, creating a powerful life resume over time. If you do nothing else, you still win the year.