Dim the lights, put on some music, and make some dough.

Ankesh has  these great suggestions at Marketing eYe for retailers:

2 very important small changes that lead to big profits:

Lighting: Change the lighting and you'll increase your profits. If you have a lot of women shoppers, use non-glaring white lights. Direct lighting makes skin look 5-10 years older. Indirect use of soft non-glaring white light makes women look younger.

Restaurants who have changed their lighting have seen profits increase by as much as 20%! Just like that! Indirect lighting changes the context and makes the food more delicious - magically!

Music: Soft classical music makes customers stay longer and spend more in your store.

Classical music changes the context and makes people believe that your store is an upscale one. And thus they spend more time and don't hesitate to buy even if your prices are higher than the competitor's.

What does your office look like?  What music is playing?