When we think of training ourselves in godliness, we usually think of the traditional spiritual disciplines, but it can also be practical activities like taking a nature walk or listening to music - whatever helps us draw closer to God. God hardwired our brains and bodies in such a way that spiritual training, combined with God's work in us, has the very real effect of making us more attuned to spiritual reality and our true identity in Christ.
I'm a bit of a nerd, and my extracurricular activity is nerd games.