1. Use unnecessary effects. Any text or image effects must suit the genre. Don't go mad using photoshop.
2. Stretch images to fit the panel- if the image isn't the right size start with then dump it! Stretched images lose marks
3. Place text across the face of the artist
4. Use fonts simply because you like them
5. Feel you need to have photos on every panel. Do your research carefully and following conventions of your genre closely. Too many photos (just to fill up space...) will lose marks.