I use ear plugs, opaque coloured contact lenses (fluorescent lighting), fidget toys, stress balls, meditation recordings, lists, a "prompt book" for daily chores and activities, dry erase boards or sticky notes all over the place, soft lighting at home, pictures of my cats, and keeping a book I really like with me. I also find that knowing what supports are available to me should I need them, and keeping a list of them, makes me feel more confident in my ability to remain calm.