Without looking, choose clothing, shoes, and so on, with matching or contrasting textures. For example, make it a silky, smooth day or a rough, nubby day. Use not only your fingers but also your cheeks, lips, and even your feet—they’re all packed with receptors for fine touch.
Extensive practice using the fingers to make fine distinctions between objects or textures causes expansion and rewiring of the brain areas involved in touch. This has been observed in monkeys trained to use their fingers to get food and in brain imaging experiments in blind human Braille readers.