What is the best fashion advice you've received from the generation older than you?

Here are some gems that I've received:

1. Posture:
I recently asked my mom what things she's glad she did for her looks when she was my age. The first of her thoughtful responses was that she was glad she found ways to keep her upper back from calcifying in a forward slope. For her, these measures have included limited yoga and exercise, but mostly relaxation techniques (particularly Trager massage) and adjustments to posture.

2. Color:
In the first few months after I started my first "real" job, the receptionist at my office, 25 years my senior, gave me some really quality advice on appearance. At the time, my professional wardrobe was quite limited and I wore mostly brown and black. Whenever I did wear color, though, she always complimented me and explained how color draws attention to the face and makes a woman look younger. I have moved jobs since then, but have never forgotten that essential advice!

3. Big Jewelry
This is a piece of advice whose source I don't actually remember, although I usually attribute it to my ex-mother-in-law who was substantial in both size and presence. The advice is, "Big Jewelry for All Women, because small jewelry makes small women look smaller and big women look bigger." I have taken this one to heart!

What advice would you like to share?