“There are a variety of methods to protect yourself and your environment energetically, it really is a case of whatever works best for you. With energy work, everything is about intention, so the stronger your visualizing and intent, the more effective your protection will be.
Surrounding yourself with a bubble, sphere, or shield of light is an easy and magical way.
This could be a bright white light, a gold light, some people choose an ultra violet light as this has a very high vibration, or an electric white blue light, like a blue flame.
Imagine an egg shaped cacoon of light surrounding you entirely. Be sure to surround your entire energy field, including your aura and your roots.