The commonest portable charm would be a crucifix or amulet on a neck-chain; yesteryear, it was almost as common to keep a rabbit's foot on the key ring or a lucky coin in the watch pocket, but people have other kinds of icons and charms, with a special personal significance, that they wear or carry for emotional security. Blankets do count! Many people also have some object that they like to keep in their work-space, where they can look at and touch it often - for inspiration, solace, to make a wish on, to ask for advice. My son, when he was a child, used to have a small stuffed cat; he'd chew on its ear when he was nervous. He secretly still carries a tiny pewter one in his pocket. A friend of mine has a potato-shaped stone that she found on the beach the summer she got her first job and met her husband. She keeps it on her desk and strokes when she's perplexed over a problem. Years ago, I had a 2" gladius-style sword on a silver chain that I wore under my shirt - nobody's business! - for a morale boost. Now I have a little hand-carved (by my lover) horse in my book-case where I see it every time i sit down at my desk. Do you have a mascot or medicine-pouch or something?