Yup it is a tough line to figure out, and we make a distinction between sales and promo's. A couple times last year we had a "bring your girlfriend in and you both get 20% off one item" type thing. We get a ton of new customers which will payback any margin dips from the sale hundreds of times over. We also do a 20% off one item on your birthday coupon, which builds our mailing list. And then we do a real sale once a year on our anniversary date of opening, and a little sale on small business Saturday (nothing for black friday). Next year for small business Saturday I think we're going to do 10 or 20% of your purchase total gets donated to x charity (gotta figure out what). My wife and I both dislike the whole made up black Friday cyber Monday and even small business Saturday thing.
Another interesting thing to think about, is what would the difference be if the margins lost during a sale (say a whole years worth of sales) was instead used for marketing. Maybe it would be enough to buy a small radio spot, or enough to get one of those picture adds that scroll before movies in the theater. In the end it's pretty hard to figure out which is better. Doing both in an efficient way would be the best strategy but for us small guys w/o whole departments figuring shit out it's pretty hard to optimize like the big guys. Lucky for us, at least in clothing, the people with disposable income seem to be getting pretty tired of big box stores, chains, malls ect.
Another interesting thing to think about, is what would the difference be if the margins lost during a sale (say a whole years worth of sales) was instead used for marketing. Maybe it would be enough to buy a small radio spot, or enough to get one of those picture adds that scroll before movies in the theater. In the end it's pretty hard to figure out which is better. Doing both in an efficient way would be the best strategy but for us small guys w/o whole departments figuring shit out it's pretty hard to optimize like the big guys. Lucky for us, at least in clothing, the people with disposable income seem to be getting pretty tired of big box stores, chains, malls ect.