Quietly ignoring post #59...
1. I would not produce a DVD. The only way something like that could be scripted, produced, performed, or marketed in any way that would not be excruciatingly embarassing would be for it to be comic and self-effacing, and somehow I doubt that's the angle I would be going for.
2. I wouldn't touch my mini's line with a barge pole because it's doing great. However, I would market stronger ties between the minis line and my D&D products; for example, if I was going to produce one large, high quality adventure per year, I would ensure there was a non-random minis pack that specifically supported it, with all of the major heroes and villains included. Through careful planning, I would ensure that many of the heroes and villains in the adventure were iconic and previously unrealeased as miniatures.
3. I would start preliminary work on 4e right now for a release 3 years or so down the line. I would think long and hard before employing any outside help in the process, worried about what that would suggest about my in-house development talent, but then, after reading Iron Heroes cover to cover in one night, I would comfort myself with my recent recruitment strategy and decide I probably don't need any outside talent after all.
4. I would start putting together an in-house software team right now. They would release several freebies over the web site as they ramped up, and their first major product would be the electronic toolkit that shipped at the same time as the 4e PHB. This toolkit would not be free, but it would not be unreasonably priced.
5. I would wonder why none of my ideas were particularly revolutionary or interesting, but would proceed to reflect on the continuing success of my little gaming empire, and would be happy to be me.