Zippers should be zipped and buttons undone before washing and drying.
Zipping the zippers helps ensure the teeth don't get caught on anything, and undoing the buttons ensures the buttons don't pull on the button holes. Delicate clothing can be placed in a laundry bag to protect them from other items.
More Clothing Tips
Reverse your hangers.
Hang your clothes in your closet with the hangers reversed once a year. As you pull clothes out, reverse the hanger. Every year giveaway clothes you never took out (hangers facing in the original direction).
Zipper stuck? Rub a dry bar of soap on both sides of the teeth.
If you don't have any soap available, a tiny bit of lip balm or petroleum jelly can be used instead.
Shoes smell bad? Dust the insides with baking soda and shake it around.
Let it sit overnight, and in the morning shake it all out. For maximum odor removal, leave the now treated shoes in the sun for the day. Repeat as necessary.