One thing that you want to keep in mind, is that you want to keep your pics to a reasonable size.
Not so large that viewers have to continuously scroll across the screen just to see segmented portions of the overall picture.
Many over-enthusiastic posters try to show off their stuff by posting a pic that's
so large, that it's nearly impossible for viewers to determine what they're actually looking at.
Plus, large pictures forces the viewer to have to scroll back and forth across the screen to read any accompanying posted text as well.
Very annoying.
640x480 is the ideal maximum size for pic posting on the forum. big joe's (above) pictures are perfect examples of that.
Also, you might want to think about turning
off the time and date stamp on your digital camera. It becomes more distracting than it is necessary.