If I was going to list a quick 'Things You Simply Must Do To Maximize Your Product Launch' Top 5, it would probably be (in no particular order) ...
1) Make sure your marketing system ... from A - Z, is ready to go BEFORE you start bringing on JV partners.
2) Make sure your product ... and marketing system, is beta tested through your list, a JV partner, PPC, to make sure that everything is working, conversions have been maximized by split testing copy, price point, etc., before the general public sees it. Pre launch is a good time to ask your core JV partners to help brainstorm any last minute tweaking before show time.
3) Set up a blueprint of the way your launch is going to run from pre launch through post launch, and make it and all other tools available to JV partners at all times. Be sure to let them know the approximate date they will be paid, as well.
4) Be sure to contact each and every JV partner that you do not have a strong relationship with ... introduce yourself and invite them to contact you via phone, IM, or email with any questions or special requests. It is crucial more so now than ever to treat JV partners like JV partners, and not simple affiliates.
5) Maintain contact with your JV partner list every 24 hours with positive numbers, and other upbeat content, and always allude to what will be in store in the next update (will Cody overtake John Reese? ... or will Ewen Chia leap frog both into 1st Place and grab the Grand Prize?).
The bottom line once you've done the appropriate testing to make sure your marketing system will sell, is that you have an ongoing rapport with the JV partners, keeping them interested and focused. Everything should be at hands reach in every mailing ... at all times. You have to make it as easy as possible for them to hit the send button (and hit it for YOU, and not your competitor).
That's my Sunday morning blabbering for this week! LOL