Hi
I would also think developing links with production houses in general would be a good idea.
Best practice. I really mean full disclosure of costs and charges, full transparency of transactions, a proper street address phone etc, full disclosure of industry partners, list of directors if you have any, professional body membership details, support service agreement, documented mechanism for resolving any disputes, realistic contracts etc.
Another obvious thing is the contract for you to host and distribute audio for the artist. Getting a balance is increasingly important. Artists now understand their rights far more. Under play the contract and you could leave yourself open to litigation, overplay it and the artists will stay away.
A lot there, but that stuff will really make a difference.