Click here to know about the rules.
(For the following, please make sure you are logged in!)
How do I submit? One way is using the upload button on the right, when browsing the picture galleries:
Another way is using the upload panel:
1 - go to the Gallery section.
2 - open the upload panel.
3 - select the image (or the images) to upload.
4 - select the folder to put the image(s) into.
5 - enter a title for the image.
6 - maybe add a description and click on the upload button.
It is possible to edit the pictures later on (go to "My Pictures" panel).