Stop looking

Lust procedes adultery. But what precedes lust? Looking! Jesus said that even if someone LOOKS at another person and then thinks about lusting after them, they have committed adultery in their heart (Matthew 5:27-28). 

Want to overcome your battle with watching porn and masterbation? Want to overcome lust? 

STOP. LOOKING. AT. PORN. Stop looking at that co-worker and lust after them. Discipline yourself to not look. I wouldn't ask you to do something I myself haven't done or tried. 

I also have struggled and struggle even now. Jesus said that if your right eye causes you to sin, pluck it out because it is better for one member of your flesh to perish than your whole self in hell. (Matthew 5:29). It's better to crucify the flesh now than to have to pay for your own sin. 

If you struggle with lust, it's a good thing you struggle because there are people out there who don't struggle and they have gone head over heels in their sin and have no problem with their sin. There is proof that God has moved in and your flesh and the Spirit of God are at war with one another. 

Pray and ask the Lord to help you. Remember that greater is He that is in you than he who is in the world (1 John 4:4). You and God against the world, the world is outnumbered and it isn't a fair fight because God is on your side!