In pursuit of sustainable happiness, it's essential to blend various philosophies and psychological concepts. By integrating Maslow's Hierarchy of Needs with Stoic principles and understanding the Hedonic Treadmill, Ikigai, and the 1-1-5 rule, individuals can strive for fulfillment while keeping long-term well-being in focus.

Maslow's Hierarchy of Needs: Begin by addressing fundamental needs such as physiological, safety, love/belonging, and esteem. Fulfilling these needs provides a stable foundation for psychological growth and self-actualization.

Stoicism: Embrace Stoic philosophy to cultivate resilience and inner peace. Incorporate the 10 Stoic principles:

1. Movement is life (Exercise your mind and body daily)
2. Heal yourself (Accept the past, embrace the future)
3. When hungry, eat; when tired, sleep; (Listen to your body, take care of yourself)
4. Seek your own applause (Work toward goals that are important to YOU)
5. Learn the art of contentment (Appreciate what you have)
6. Boldly face the struggle of life (See challenges as opportunities as opposed to problems)
7. Find an anchor, be an anchor (Find a mentor, be a mentor)
8. Don't just live long, live now (Live in the present prudently and with enthusiasm)
9. Be generous to others (Encourage, listen, love, and give back)
10. Create your own philosophy (Everyone is a little different, you do you)

Minimizing the Hedonic Treadmill: Recognize the tendency to adapt to positive changes and revert to a baseline level of happiness. Combat this by cultivating gratitude, mindfulness, and intentional living. Continuously pursue growth and novelty to counteract hedonic adaptation.

Ikigai: Aim to discover and pursue one's "Ikigai," a Japanese concept representing a sense of purpose and fulfillment derived from doing what one loves, what the world needs, what one is good at, and what one can be paid for. Ikigai provides a holistic framework for finding meaning in life and aligning actions with values.

The 1-1-5 Rule: Reflect on actions and decisions based on their potential impact over different time frames: one day, one year, and five years. Strive for coherence between short-term gratification and long-term aspirations, ensuring that present actions contribute to future well-being and personal growth.

Incorporating these elements into one's life fosters a balanced approach to happiness, one that prioritizes inner fulfillment, resilience, and meaningful engagement with the world. By understanding and applying this formula, individuals can navigate life's complexities with purpose and resilience, ultimately leading to a more fulfilling and satisfying existence.