This is very important when it comes to analyzing blood samples. One more thing with how to become a phlebotomist; you shouldn't be afraid of blood. All that you have learned will just go down the sink if even a single drop of blood is sufficient to make you back out. So, it could undoubtedly be important to have a strong stomach. Enjoy your task as well and make sure that it's something that you wish. In the event that it's not actually what you really had in mind as a career, then be sure that it's not a thing you don't see yourself performing.