1) Wear solid colors or subdue prints.
2) Unless everyone is wearing the EXACT same outfit, do not all
wear one color - the outfits are more likely to clash.
3) DO NOT cake on makeup. If you have a small blemish, leave it
alone. A Level 1 retouch can remove it easily. Excess makeup
can complicate things, and a Level 2 or 3 may be necessary
clean up the image.
4) Don't fret over the little things. The cost of retouching can be
worth the sanity saved!