If you are in snow country, you can hide your hair/baldness under a hat. On sunny days, you can use sunglasses to conceal your eyes. If you are not too picky, you can use makeup to look garish (if you usually are natural or elegant).
I usually wear a plain look. This is boring, forgettable, and practical. Sometimes, it is good to look different in case someone will see me twice in one day or shortly after a shop visit.
If you are clever, you can age your appearance with latex, cosmetic age spots, or whatever they use in theatrical world.
Nature does not hurry, yet everything is accomplished. - Lao-Tzu