Specials and Promotions I do all the time! I send a Newsletter every month to all of my customers! Its full of info and always a deal just for them!
As far as Discounts... Aside from the random sale... I don't do a blanket YT discount because it would violate retail agreements that I have with some of my vendors. Unless I have decided to discontinue a vendor that has a set retail price I must honor that price, otherwise I risk losing my account with them for good
But I more than make up for it through my Newsletter. I offer special's and giveaways to my customers and I will post great buys here on YT. I also offer the best price on shipping, based on actual weight, I don't charge a handling fee, and If you shop around and compare, my prices are more than fair, they're competitive.
It was pointed out to me by a a customer that my price with shipping was lower than another online store that offers a 10% discount. In the end, the my honest shipping, free handling and competitive pricing can add up to a bigger savings than a discount.
Just another way I spoil my customers!