Take the photo you wish to enter into the contest. Follow these rules.
You will need to download the photo from the camera to a device that connects to the Internet. This will normally be a PC. Digital camera usually come with a cable for this purpose. One end of the cable attaches to the camera. The other end of the cable attaches to the PC usually via a Firewire or USB port. Once connect, set the camera to PC mode. Open My Computer on the PC and double click the drive that represents your camera. Locate the picture you want to upload and drap it from the camera drive to another location on your PC. This other PC location can be any drive (hard drive or another removable drive) - just remember where you put it so you can retrieve it when you upload it to Flickr.