From the Clean Clothes Campaign website:

Four major steps companies can take to ensure their products are made under humane conditions.

Sweatshop abuses are a systemic problem - there are no companies that are totally clean or totally dirty. Every company that sources globally faces problems that need to be addressed. While there are many steps companies can and should take (and to a certain extent have already taken) to improve workers rights, there are no quick-fix solutions. In this guide the Clean Clothes Campaign offers guidelines on what companies can do to better assess, implement, and verify compliance with labour standards in their supply chains, and eliminate abuses where and when they arise.