Alma Chapter 13

13:2-13 - "...this is the manner after which they were ordained—being called and prepared from the foundation of the world according to the foreknowledge of God, on account of their exceeding faith and good works..."
When we teach fore-ordination, it's important to remember not to have feelings of entitlement - just because we made some correct choices before this life doesn't guarantee us eternal life.
Just because somebody else didn't make as many correct choices doesn't make them lesser than us, and doesn't imply their downfall.  They have just as much a chance of making it back to live with Heavenly Father.
The big question is what we will do with our own individual circumstances.  Verse 13 sums it up very well - "I would that ye should humble yourselves before God and bring forth fruit meet for repentance, that ye also enter into that rest."
If we want eternal life, we must humble ourselves and repent, not just turning away from sin, but also turning to God.


13:4 - "...and thus they have been called to this holy calling on account of their faith..."
This implies several things - we need to have faith in Christ and follow His teachings and apply His atonement in our lives.  We also need to be an example to others in our faith, using our faith, showing that we do trust the Lord, and that the Lord can trust us.


13:23 - "...and they are made known unto us in plain terms, that we may understand, that we cannot err..."
The Gospel is made known unto us in plain terms, so that we cannot err (Alma 5:43).
This was one of the downfalls of the Jews - as they sought for deeper and more complicated parts of the Gospel, they got it, but then erred.
This is why we must work our hardest to learn the plain things of the gospel - then we will not err, if we follow them.


13:27 - "...I wish from the inmost part of my heart, yea, with great anxiety even unto pain, that ye would hearken unto my words, and cast off your sins, and not procrastinate the day of your repentance..."
Elder Donald L. Hallstrom talked about procrastination in the November 2007 Ensign, pg. 49-51 - "Procrastination may seem the easy way, as it momentarily removes the effort required to accomplish something of value.  Ironically, in time, procrastination produces a heavy burden laced with guilt and a hollow lack of satisfaction.  Temporal and, even more importantly, spiritual goals will not be achieved by procrastination."
We need to stop putting of doing what's right, and continually improve ourselves instead of in short bursts and long lulls.