Grafting Financial Habits Like a Plant Cutting

You know how in botany, a well-chosen graft can transform a plant’s entire growth? I’ve been wondering if there’s a financial equivalent. If you could take one money habit and graft it seamlessly into your routine, what would it be? I’m curious what single practice has made the biggest difference for others. For me, keeping a simple spending log has been surprisingly helpful, but I’m always looking to cultivate better habits. What’s yours?