Efficient use of fridge space involves prioritizing older leftovers for consumption by arranging them at the front, while newly acquired items should be placed toward the back. To tackle the common issue of lost condiments, using a lazy Susan can enhance accessibility and awareness of inventory. Different storage solutions are essential for both fridge and pantry; glass and plastic containers are suitable for refrigerator leftovers, while dry foods need specialized storage options like Rubbermaid Brilliance to maintain freshness and organization.