Make sure you have a dry, well-ventilated area to work for the next step. You can use a mask if you are especially sensitive to the solder fumes. DO NOT directly breath in the solder fumes. They are toxic in large quantities.

Plug the soldering iron into an outlet and set it it in an area where it will not risk melting or igniting its surroundings. Allow to heat fully before using.

Only touch the iron in the designated spaces. The metal can cause severe burns if it makes contact with your skin.