I also advocate a PLAN (as the other posters have already said). This plan will be the template for long-term sobriety. Not only must there be a plan, but he needs to FOLLOW the plan.
There are many paths/plans. I would check around, talk to bro, and put something together. My plan is posted on this board somewhere. I wrote it over 3 years ago and still follow it today. (most of it...some of it concluded, like marriage counseling, etc)
Found it:
My Plan (post #6)