Various places so I always have some around when needed. Keep a pair at work, one in each suit jacket, and a couple around the house and in the pockets of my winter jackets. I don't need them constantly, just when I need to read small print or in the dark, so I just leave them in places where I'll likely need them. And I don't care too much about the fashion of them or how I look in them because I don't wear them all the time.