Closets don't like to stay dry, and often attract unwanted scents (and sometimes creatures who like that environment). Once easy way to solve the problem? According to how-to illlustrator Yumi Sakugawa, the answer is chalk.
Chalk absorbs moisture, as many sources attest, so it's a helpful aid to reduce dampness—and the resulting smell in your closets. Just tie up a bundle with some sturdy string and hang it where it won't brush up against your clothes. It'll absorb moisture, the resulting smell, and your closet will become a nicer place to be.