In the 2nd letter of Peter's that he wrote to the believers with who he had contact, he wrote some pretty practical stuff.
He's basically tell people to grow up in the habits they have as followers of Jesus.
They not only apply to folks who lived back then, but also to folks who live today.
2 Peter 1
By His divine power, God has given us everything we need for living a godly life.
(dan note: power statement right off the bat!)
We have received all of this by coming to know Him,
the One who called us to Himself by means of his marvelous glory and excellence.
4 And because of His glory and excellence, He has given us great and precious promises.
These are the promises that enable you to share His divine nature and escape the world's corruption caused by human desires.
5 In view of all this, make every effort to respond to God's promises.
Supplement your faith with a generous provision of moral excellence,
and moral excellence with knowledge,
6 and knowledge with self-control,
and self-control with patient endurance,
and patient endurance with godliness,
7 and godliness with brotherly affection,
and brotherly affection with love for everyone.
8 The more you grow like this, the more productive and useful you will be in your knowledge of our Lord Jesus Christ.
9 But those who fail to develop in this way are shortsighted or blind, forgetting that they have been cleansed from their old sins.
10 So, dear brothers and sisters, work hard to prove that you really are among those God has called and chosen.
Do these things, and you will never fall away.
11 Then God will give you a grand entrance into the eternal Kingdom of our Lord and Savior Jesus Christ.