I found this short (about 2 min.) video of Frederica Mathewes-Green talking about fasting. There's a lot of good stuff in those short two minutes, and it's a good one to listen to before Ash Wednesday tomorrow.
Particularly good, I thought, was her observation that we join in the traditions of the church (such as fasting) as children: we might not understand why it's all good for us, but we can still participate. My mom and I were talking this morning about how there are a lot of things that you don't really understand until you do them. Obedience leads to understanding.
And as the blessed George Herbert pointed out, "the Scriptures bid us fast; the Church says now".
God's blessings on you as you keep a holy Lent. And pray for me.
peace of Christ to you,