I got some redeye ideas from this Forum:
Stop your subjects drinking before photos (impossible N.Y'rs Eve)
Move further away: Impossible with small cams and small flash.
Offset the flash w. respect to lens: not possible on small cams.
Use Bounce flash: Need External, so more expensive cam features.
Pre-flash, but doesn't always work after drinking.
Subjects wear shades!
Best advice so far, is to perfect technique in editing. Happy N. Year