As of version 5 and greater, Photoshop includes a very handy Save for Web command. This feature allows you to produce a copy of your image that is optimised for web use. This means that the image file will be as small as possible, and that the image will use only web-safe colours (if desired). Save for Web can produce GIF, JPEG, or PNG format images.
Having your company logo design done by a professional can be an expensive process. Hopefully this tutorial will give you some ideas on creating your company logo yourself.
Crescent shapes are very popular, and grace everything from logos to websites. Best of all, they are also simplicity itself to create, and can be combined with layer effects to create stunning designs.