1) Don’t wear horizontal stripes or crazy patterns. Opt for neutral colors over bright ones.
2) Stand up right; slouching makes you look nonchalant, but it also makes you look short and/or dumpy.
3) Watch Where you Stand. An interesting background will make you look more interesting too. Choose a pretty outdoor scene to stand in front of, or look for a wall with interesting texture or colors. Avoid standing in front of plain or drab backgrounds.
4) Flee the flash. Avoid the unforgiving bare flash at all costs. If you can’t get around it, search your pockets for a translucent candy or gum wrapper and put it over the flash to diffuse it.