1. Let me know if you plan on using one of my photos.
2. Make it look nice. Don't just apply a couple of effects to it and call it art. Draw it, paint it, photomanipulate it, whatever. But make something you are proud of.
3. Link it back to me. Ask before you try selling it. Keep it to art that is put on dA.
4. And give me a link to the finished picture, so I can add it to my favorites.
5. Let me know if you want a similar but different image. Taking pictures for you is fun.