Relationship satisfaction can be improved with small cognitive shifts called "love hacks." These involve changing one's internal narrative rather than external realities, such as adopting a "growth mindset" about compatibility or reinterpreting a partner's negative behavior more charitably (e.g., as situational rather than characterological).

The mindset that "everything is figureoutable" includes a crucial nuance. The solution doesn't always involve brute force or persistence. Sometimes, the wisest way to "figure it out" is to recognize a dead end, cut your losses, and redirect your energy to a more fruitful endeavor.

An unfortunate irony of life is that the obsessive, critical, and problem-focused mindset required to achieve professional success is often the very thing one must abandon to find happiness in personal life and relationships. You can't easily compartmentalize these two modes of being.

If you feel like you're constantly struggling, it may be because you're forcing old habits into a new season of life. Self-awareness is key. By asking "What season am I in?" and "What am I optimizing for right now?" you can realign your habits with your current reality, reducing friction.

A rational optimist's mindset views problems as opportunities for growth and discovery, not setbacks. Life is movement and stasis is death. Engaging with problems, even when it causes disruption, is necessary to create progress and unlock new, better challenges to solve.

To avoid analysis paralysis in major life decisions like marriage or faith, adopt the Marine Corps' leadership principle: gather 80% of the necessary information, then make a choice and commit. Waiting for 100% certainty is a trap that paralyzes action and postpones happiness.

View habits as having "seasons" rather than as rigid, lifelong commitments. A habit that serves you well during one phase of life (e.g., building a startup) may need to be adapted or replaced in the next (e.g., raising a family). This flexibility prevents feelings of failure and promotes long-term success.

Any goal, no matter how abstract, can be improved if it's measured. Even a complex concept like a successful marriage can be tracked with a simple daily metric (e.g., a "red dot/green dot" system). This creates a tangible signal to steer by, as "what gets measured gets improved."

High achievers often apply immense rigor to their companies while neglecting their personal lives. To avoid this imbalance, treat your life like a business by implementing formal processes like quarterly reviews for relationships and personal goals, ensuring they receive the purposeful investment they need to thrive.