[header] How to take a shower if you're blind or visually impaired [title] Turn on the cold water before you get in. [step] Whether or not you're using a shower that you're familiar with, turn on the cold water first. Then, mix in hot water until the water reaches the temperature you desire. 
Use your hand to test the temperature of the water before you jump in the shower. This will keep you from being scalded by overly hot water, or shocked by water that's too cold.