I have to go with the first poster about pricing. Considering what one could pay for beads online--even branded items like Swarovski or Delica, it is really hard for me to plunk down the prices that bead stores want for the same items--especially if I can get free shipping with no minimum. The upside to shopping them in a store is that you can see the actual colors.
Yes to natural light but also to halogen/highhat/whatevertheyarecalled nowadays-- those lights make crystals dance!
Know your audience--not all neighborhoods can sustain a bead store with only high end items. While I'm not a fan of plastic beads (a la WM), they do have their place in crafting--and they are great for younger beaders. Apparently, there are floods of inexpensive glass beads coming in from China--the quality may not be up to Japanese bead standards but the price is usually right for the novice and casual beader.
I like the "open studio" idea, as well. For those beaders who can't afford a formal class but would like to have some questions answered (kind of like on this forum), that would be ideal. Actually, it would be great if the employee(s) could answer such questions whenever they aren't busy.
oh, and inspiration--display items you or your customers have made. Nothing whets the appetite more than seeing something you <3