Look Younger ... avoid black eyebrows

HD black eyebrows work well if you're 20 something, but when you get older black eyebrows can be very ageing.  If you use an eyebrow pencil / shadow always choose one that is a shade lighter than your own natural hair colour, as this will flatter your face rather than age it.  Rachel Welch's eyebrows are still one of her best features even though they are a lot lighter than they used to be:

Stunning Raquel Welch; perfect eyebrows throughout the years!

As for their shape, use a pencil to align against your nose to find the best place to start / end your eyebrows, as shown below.  If you find that the edge of your eyebrow doesn't quite reach the point it should, use an eyebrow pencil to lightly feather in the missing hairs.  If you do this very lightly and add a little powder to set, your eyes will look lifted & you'll look younger.  

Perfect eyebrow shape