How can I improve my photo sales?

We recommend that you update your keywords first. If people can't find your photo then they can't buy it.

You can also check out your photo Statistics, to learn about how people find your photos.

Also, if you aren't already doing so, shoot photos on your camera's highest quality setting (or get your photos professionally scanned if you shoot on film). The higher the resolution, the better the quality and the more possibilities for a buyer.