Keep dried herbs and spices fresh longer with this tips: Store them in airtight containers, preferably glass, instead of metal or plastic, which can impart strange flavors or leach chemicals. Store them out of direct sunlight and keep them cool and dry—away from the heat of the stove. If you grow or buy fresh herbs and dry them, make sure they are totally dry and crumbly before packaging them to prevent spoilage. Store whole leaves when possible and crush them as needed for maximum flavor. And, make sure you label and date your herb and spice containers—they lose their potency over time. Consider spring cleaning your herb and spice cupboard every year and replacing outdated items.