First, get them out of the plastic wrap and take off the ties. Let them breathe.
Pull out any stems/leaves that are already breaking down.
Rinse them, loosely bunch them and then give them a fresh cut across the bottoms of the stems.
Put them in a small glass of water and keep them in the fridge.
Every couple of days, refresh with new water, remove any stems/leaves that are no longer viable and trim the ends.
This works primarily for herbs with stiffer stems, such as parsley and cilantro. Softer herbs like basil and sage, really should be used fresh off the plant, as they do not hold well. If they do come home from the store, those we typically leave in their “corsage” boxes for safekeeping, but not more than a few days.
Just like flowers in the fridge in the floral department, fresh herbs stand proud at home in the fridge. When we can simply reach in and grab a mini vase of herbs, it becomes easy pickin’s for flavoring and garnishing dishes.