Service

Moses 1:39 says that God's work and glory is to bring to pass the immortality and eternal life of man. Mosiah 2:17 says that when you are in the service of your fellow men you are serving God. When I serve others, I am helping them in a small way towards eternal life, so I'm literally serving God because I'm helping Him with his work. Pretty cool way of looking at service.

Analogy for grace, faith, and works

Let's say I want to go to Japan. There is literally no way to get myself there using my physical body. There is an ocean between my destination and I can't swim across it. Someone tells me there is a plane that can fly me there. So I buy a ticket and get on the plane. It then flies me to Japan. I didn't get myself there, but if I hadn't believed the plane could get me there and boarded the plane, it would have gone there without me.

Grace through Christ's Atonement is the plane. Faith is believing that the plane can get me there. Works is buying the ticket and getting on the plane. All three parts are absolutely essential. However, it's clear that Christ is the only way we have any chance to return to our Heavenly Father. He does the heavy lifting.