[As posted on http://sassybot.com/blog/isometric-tile-workflow-for-your-game/]
Isometric tiles are widely used as assets in game development. If you are interested in creating tiles of your own you may find the following tutorial useful. With this approach you will be able to quickly create tiles to use in your game. Keep in mind that this is a method I use and may not be particularly optimal for your application. However, for rapid prototyping this method can potentially save you a bit of time.