"Ye have not yet resisted unto blood, striving against sin." (Hebrews 12:4 KJV)
"For the time is coming when people will no longer listen to sound and wholesome teaching. They will follow their own desires and will look for teachers who will tell them whatever their itching ears want to hear. They will reject the truth and chase after myths. But you should keep a clear mind in every situation. Don't be afraid of suffering for the Lord. Work at telling others the Good News, and fully carry out the ministry God has given you." (2 Timothy 4:3-5 NLT)
Basically, the way I believe we can best strive against sin, is by doing the opposite, which would be to focus more on serving the Lord, in as many ways that you can; making the time we have left on this earth be joyful and an expression of the peace we have in the salvation we have been given. This might not seem as though it works all of the time, but it does make a huge difference in the way you walk out the Lord's calling upon your life: in whatever do, do it as unto the Lord!
Because I get to drive around all day, making it to appointments, I really get enjoyment listening to teachings that come through the radio. Not that it is the most important thing, but it is the thing that causes me to think and put into practice sharing God's word, in some form or fashion. When you get inspired by the message you hear, you will look for a chance to share the words that were spoken.
What I am trying to say, is the more we focus and strive to do what is good and pleasing to the Lord, the less we fall into sin and do that which isn't good and pleasing to the Lord...
"Because of the weakness of your human nature, I am using the illustration of slavery to help you understand all this. Previously, you let yourselves be slaves to impurity and lawlessness, which led ever deeper into sin. Now you must give yourselves to be slaves to righteous living so that you will become holy. When you were slaves to sin, you were free from the obligation to do right. And what was the result? You are now ashamed of the things you used to do, things that end in eternal doom. But now you are free from the power of sin and have become slaves of God. Now you do those things that lead to holiness and result in eternal life. For the wages of sin is death, but the free gift of God is eternal life through Christ Jesus our Lord." (Romans 6:19-23 NLT)