The Revolution with be rolled on 2D6!
Having worked in the game industry a little as a freelance writer, artist, at a retail gaming store and in PR and marketing, there are a few things I would do based solely on my experience (which is way less them the real pros)...
1) More and Better Graphics and Illustrations. In my mind I see a completely different look and feel to rulebooks and sourcebooks. I imagine them more like art books and "Art of the Movie" books with stats. It would be expensive I know, but it would wow the customer in a way that books these days just don't do.
2) As already mentioned, up the advertising budget. More and more wide spread ad campaigns are needed to gain the wider audience that some game companies seem to think will magically appear.
3) Good press. D&D, and as a by-product RPGs in general, have suffered (and perhaps been a assisted a bit) by bad press from the 80s. While we all know RPGs promote a number of useful skills, including creative problem solving and social interaction, most people still think it's somewhere between a violent computer game and a cult
4) More and better merchandising and cross marketing. Comics (that don't suck), T-Shirts, Toys, Video Games, whatever it takes. Check out ThinkGeek and it's plethora of products with gaming related slogans and phrases. I was at a number of Anime conventions where many of the attendees were wearing these types of t-shirts. Gamers wear them and it serves as a form of free advertising. Non-gamers laugh at a shirt or are confused by it and ask what it's about. Bingo! You've introduced gaming, in a fashion (pun intended), to a non-gamer.
I'm sure there are other things I could think of but my mind is cloudy right now. I'll try to think of some more when my mental weather clears.
NewLifeForm
"Mostly Harmless"