Titus 2:1 But as for you, promote the kind of living that reflects right teaching.
The Apostle Paul is telling Titus to promote a lifestyle that is consistent with sound doctrine. He is saying that if we are not living godly lives then we aren't living what we are teaching and preaching. There is no middle ground where we can justify not doing what we know God says for us to do. If we are not living holy lives, we are not living in obedience to God and we are not in fellowship with God.
It is not easy to always do what we know God commnads us to do. Holy living is indeed a very difficult life to live because we are living in a sin-infected world with by nature sinful hearts. We are naturally drawn to sin and the only way we can resist it is to willfully seek Christ's help. We must determine in our hearts and minds to do what is right before God instead of what our flesh desires. We must resist the temptation to compromise what we know is right. We must keep our eyes fixated on Christ and not on the allurements of sin. It takes great determination to do what is right before God and no one does it perfectly all the time.
The key to practicing what we preach is to keep our souls saturated with God's Word and spend much time in close communion with God. We must read the Word of God with open hearts and minds, ready to listen and learn from God. We must desire to grow in holiness. We must refuse to let things into our hearts and minds that are not beneficial for our soul's well-being.
The reward for living a life that reflects right teaching is being richly blessed by God both here and in heaven. Our failure to do it is the absence of God's fellowship and blessings both now and forever.