Many of us have to travel on business, and face additional temptations. Here are some strategies that can help:

Put a picture of your wife and kids in the hotel room.
Call home every day.
Double the amount of time you usually spend in the Word. Work on memorizing a verse or passage.
Play Christian music in your hotel room -- get a Christ-praising song in your heart and head!
Limit TV watching. Put a towel over the TV to add a step to turning it on. Don't watch anything you wouldn't watch with your wife.
Have an accountability partner who can check on you. Work out code-words to use in normal conversation or around others.

Remember that God is always with you and watching you - nothing is hidden from Him. We are surrounded by a great cloud of witnesses -- and my dad, grandfather, and great-grandfather are among them. May God, our families, and our brothers find us faithful. Amen!