I want to get rid of drinking, watching porn, and masturbating (want it to be less frequent).

Right now I drink about 1-2 times a week and have been watching porn/masturbating once a week too. I know it might not seem super bad, but I have tried to abstain from all 3 of these vices at the same time and I always fall back into doing these things.

Would it be best to continue trying to rid myself of all 3 of these things cold turkey, or to tackle one thing at a time, building a new habit to replace one of these shittier ones?

Example: First month just focus on not drinking, after that month start to focus on not watching porn, etc.

Thoughts and personal experiences welcomed.