James Clear writes about habits and health on his website JamesClear.com. He spends his time writing articles, doing travel photography to document habits in different cultures, and weightlifting. He discusses focusing on systems rather than goals, as goals can be unpredictable but systems of small, consistent improvements each day will lead to significant results over time. The key is maintaining an average speed through consistency rather than trying to work at a maximum speed which is unsustainable. Micro-goals and a focus on continuous self-improvement are effective approaches.