Tickets to Broadway shows are pretty expensive and, in the past, you've had two choices: Pay full price and book your seats in advance or brave the TKTS booth on the day of the performance you wish to see. If you do the latter, you get deep discounts but you often face long lines and the possibility that they won't have seats (good or at all) for the show you want to see when you want to see it.
There is another way, though I must caution that I haven't tried it myself yet. Theatrical producers often send out ads with discount ticket codes, and one website has established itself as a central gathering point for such info. It's at www.broadwaybox.com and if you go there, you can perhaps find a code number that will save you beaucoup bucks on tickets you order in advance. Naturally, not all shows are available but it's probably worth a visit.
The snag, I am told, is that some box offices try to weasel out of honoring a discount code unless they know you obtained it via the intended route. That is, on a given show, they might put a certain code only on flyers distributed in a select area or to a select demographic. Then, when someone shows up at the ticket window with the number but not the flyer, the cashier argues that the purchaser is not eligible. The solution is to use these discount codes only for telephone and online orders. Odd that this should be a concern but I'm told it is.