I'm sure others can give you a little more detailed advice, but here is what I know from my personal experience.

At this point in the game, you pretty much need a WWW to have a chance at the all-dicipline LBs. Svenning helps (not sure how much, someone else can probably weigh in with more detail) and training should give you a good indication of a promising stallion (all up wk 4s, multiple up wk 7s), and ultimately it's just a little luck to actually get on the LBs.

Unfortunately EEW combos are pretty much phased out as far as public interest goes. You likely will not get anyone to breed them, unless they are true color bombs and your breed happens to have a market for that.

Best practices for promoting a new stallion? Putting up a straw thread in forums is a good idea, once you have a promising WWW stallion people would be interested in. Starting small (like free straw incentives or at least cheap straws) will help get you people that are willing to help you "test" him as a freshman. Setting the breeding requirements and having people FR anything under EEE is a good idea. I even offer buy-backs for some of my LB horses.

Anyway, hope this helps!