If your particular struggle is with sexual lust, make sure don't put yourself in a position to be tempted. You get the idea. Be careful what you allow into your mind. Temptation is the downfall of man, he who can withstand temptation will never have downfall. Don't mistake temptation for opertunity.
Temptation is strong.
So when temptation threatens you, go to the Lord in prayer. Thank God for Christ and His sacrifice. Thank God for all the spiritual blessings you received. He showed to you. Thank God for sending His son to shed His blood on the cross so you may have eternal life.