CUCUMBERS:
Remove the plastic, wash, wrap in paper towels, refrigerate in sealed silicone bag.
AVOCADOS:
Cut in half, rub with piece of lemon, refrigerate inside sealed glass jar w/ the lemon. For whole avocados just store them in veggie drawer with whole lemons.
PARSLEY / CILANTRO:
Trim off the bottoms, set them in filtered water, loosely drape wax paper over them & refrigerate.