Sooo many great suggestions here, I'll just affirm a few that I think are particularly good:
1. Sobriety #1, otherwise every other effort is for naught. Ask for proof because it's important to you that he get "clean". More than just "okay I've stopped drinking." Addicts lie to themselves, so they have no problem lying to you. (Speaking from nicotine addiction myself
)
2. Help him get a job, but don't let him think it's shoo-in.. No pride in that, no sense of earning it.
3. Financial help? Hmm... IF you can, IF he gets clean, IF he shows willingness to do something good with himself.
4. I LOVE the idea someone had about having him volunteer. What a great way to get someone to see that others have it worse, that they are helping, and get instant feelings of having done something good.