"There can be no question of other sacrifices for sin, for our salvation has been achieved by Christ's unique sacrifice; our sacrifices are sacrifices of praise and thanksgiving"
- John Stott, The Incomparable Christ
One of my personal experience of sacrificing and giving myself to God is by the means of FASTING. Giving up food is an outward action for me for an inward commitment. As Ezra 8:23 says, "So we fasted and petitioned our God about this, and he answered our prayer." It requires sacrifice and discipline.
I know that the purpose in fasting for God is not about giving up food; it is about removing the obstacles that get in the way of fully focusing on Him. We human beings are conditioned to eat, usually 3 meals a day and snacks. We are so focused on what we are going to eat next, we leave very little room in our minds for thinking about God. Removing the food free up my mind so I can meditate more freely on God.