For about 10 years (from 22 years of age till 32) I was much like Luscious. I was periodically depressive, always anxious, and had a lot of compulsive behaviours (porn and intoxicant consumption). I was in a foul mood most of the time, and easily angered.
Nowadays I have no depression, occasionally have mild anxiety of short duration, and very infrequent compulsive behaviours. Watching porn nowadays is a bizarre experience for me: All I see are young well-formed apes having sex. It's almost as erotic as watching dogs copulating. I can barely get it up.
I want to keep this post short because I am working.
You say "just have it, it won't hurt, you only live once". That's exactly how it is with me. Unless you directly experience the negative effects of something, you won't drop it. Once you have experienced it, you would be as inclined to do it as put your hand in the fire.
The way to drop these things is not through discipline. Discipline is like morality. You do it because others say you shouldn't.
The way to drop these things is by sensing them destroying your calm and equanimity. But, to sense this, you need to have calm and coolness in the first place.
Calmness and coolness comes from abandoning the gross things, from developing sensitivity. Then, you become very sensitive to your internal state, and can sense how little things rock the boat, agitate the waters of your mind and body, leading to stress and chronic pain.
My advice: Sleep 8 hours a day, become a vegan, do anapanasati.