Talk about specials in your pro shop. Include a coupon for one free game that the viewer can print out. As the popularity of the Internet grows, the network traffic can sometimes get very congested on relatively slow connections. It is believed that the typical viewer will not wait more than 20-30 seconds before they bail and move on to another Web site. This includes animated graphics.
Graphics are the biggest reason for slow download times.
Small, efficient sound files. Use client side functionality when possible. If your Web site has a Web page that has a known high probability of slower download times, then let your viewers know that so they'll understand they'll need a little extra patience. Unless you're targeting a specific user group with a known computer and browser setup, your Web site should be compatible with the vast majority of browsers and computers, and their different versions. This enables them to have a Web page downloaded quicker because the images on that Web page are not downloaded.