Sleek and slim rolling carts, which can tuck on the side or in-between the washer and dryer, area always a space saving storage win. As are wall hooks when there is no space for an entire hanging rod setup.
Place plastic storage bins inside a hanging sweater organizer! Paint end with chalkboard paint for easy labeling. When baby is older they can be used for toy storage! - DIY - nursery inspiration (good idea if you have more closet space then floor space)