How can I effectively use baking soda to unclog and freshen up my drains?

To effectively use baking soda to unclog and freshen up drains, pour about 1/2 cup of baking soda down the drain followed by 1/2 cup of vinegar. Let it sit for about 30 minutes, then flush with hot water. Repeat if necessary. Baking soda helps break down clogs and neutralize odors in the drain.