Bread: To slow down regression-- the process in which the starch particles in bread take shape-- Cook's Illustrated states to save bread at area temperature for approximately 2 days, either tightly-wrapped in foil or in a Ziploc bag to minimize moisture loss. The temperature level there is one of the most consistent, so they'll keep much longer.
Mushrooms: Inning accordance with our pals at the Kitchn, commercial mushrooms (the ones you purchase the grocery store) are best left in their original product packaging. Airtight tins or tiny flavor containers are the best mode of storage space.
Pies and pie crusts: You can freeze crusts and also entire pies, baked or unbaked. Do not