Do you have extra yarn lying around that you don't know what to do with? Instead of letting it collect dust, consider donating it to someone who can use it.
There are many organizations and charities that accept yarn donations and use them to create handmade items for those who could use a little extra warmth and comfort.
Facebook is another great place to find online communities dedicated to yarn crafting. There are many groups on Facebook that accept yarn donations and connect crafters with each other.