Aw, c'mon, we all know people see those glossy buttons and banners and go 'Oooh, shiny!' and become instant fans of a site. Kidding aside, I found this tutorial that makes some nice glossy buttons with minimal effort.
http://www.hongkiat.com/blog/create-cool-glossy-button-for-web/. Tinkering around a little with the steps gives you some pretty nice results. Personally I omit the step involving the diagonal lines but to each his own.