We think it is the big things.
It is far more often the little things.
In the Christian spiritual life, think about the disciplines and practices that are foremost in your tradition. Prayer. Attending worship. Serving others. Reading or studying a Scripture portion. Fasting. Generosity and giving.
Don’t think about what doing these things might render in a day, or a week. Consider what might happen if you did these things routinely over years, even decades.
Choose a few seemingly small commitments. Keep them.
You won’t know where keeping those commitments will take you, what it will render.
But years from now, you may be very glad to have found out.