And clean teeth. A lot of women forget about that.
There's a lot of fun to be had if you are not afraid. It's great to have a beautiful bag.
If you are wearing an army-surplus coat, put it with ballet shoes, not heavy boots.
If you are in diamonds, then play them down with a matelot top. Oh, and never wear fur.
Keep an element of punk in your wardrobe - always. Even Chanel was a bit punk; the way she wore jersey and fake jewellery was a rebellion in her day.
Don't be afraid to make mistakes. If you have never put a foot wrong, you're probably too set in your ways.
Look for alternative ways of expressing what you feel: you may not want to wear a fluorescent dress, but how about a pair of tangerine patent shoes?
Dressing head-to-toe in expensive clothes can be as big a mistake as always wearing cheap ones. At every age it's far more effective to mix things up. I like it best when it's not obvious where my clothes come from.
Be open-minded about new labels. It's great to have tried-and-tested ones, but thanks to my two daughters I'm also a regular at H&M, Gap, Isabel Marant, Aspesi and Vanessa Bruno.
(Propos recueillies from The Times).