Bill Hull discusses both voluntary disciplines e.g. prayer, fasting, silence, solitude, frugality, worship, service, sacrifice, as well as non-voluntary disciplines e.g. conflict, persecution, the dark night of the soul.
Many of us sometimes think there are enough of the non-voluntary spiritual disciplines that they take up all our time. But I might suggest that the intentional practice of the voluntary will help us endure the non-voluntary.
