Your next breakthrough starts with one experiment.

You've done the courses, listened to the podcasts, made the plans. But you're still stuck in the same patterns. The problem isn't your ambition — it's that you've been trying to think your way into change when you need to experiment your way there.

The Experiment Mindset offers a radically different path. Drawing on cutting-edge neuroscience, behavioural psychology and over a decade working with leaders and founders,​ ​leadership expert Tamsin Simounds reveals how real transformation happens: not through what worked for someone else, but through discovering what works for your brain, body, and life.

• Apply the Three Levers of Change (Psychology, Physiology, Environment) to create sustainable growth
• Become your own best experiment and gather real data about what works for you
• Navigate failure as feedback, turning setbacks into stepping stones
• Build ​​wisdom through action, not endless planning
• Rewire your brain to help you adapt to constant change

The Experiment Mindset is a science-backed, story-rich guide for ambitious professionals, emerging leaders and anyone tired of fluffy advice. With practical frameworks, real-world examples and actionable experiments you can start today, you'll learn how to evolve through change — one small, courageous ​​test at a time.

TAMSIN SIMOUNDS is a leadership expert and keynote speaker whose expertise has been featured in Thrive Global, Smart Company, Business Chicks and Women’s Agenda. With a decade of lived leadership experience and another decade coaching leaders, she has worked across industries from big banks and fast-growth tech startups to social enterprises and small businesses.