If you're someone who finds themselves particularly suggestible, or who wants a little extra security, it can be useful to go through a session of protective suggestions. Typically, these suggestions give you more control over what suggestions you accept in future hypnosis trancework.
The idea is that if you take to suggestions well, getting in with good, empowering suggestions beforehand can help you deal with anything unscrupulous later. Additionally, if you have been given suggestions you don't want anymore, a protective hypnosis session can help to remove them more quickly, if they aren't fading fast enough.
I was recently presented with this protective hypnosis video, titled "The Hypnotic Shield" that helps you remove unwanted hypnotic suggestions and effects, and have more control over which ones you accept in the future. I highly recommend watching a video like this one if you're perusing YouTube or other sites for hypnosis sessions. Everything I heard and saw in the video seemed supportive, but like any other video, I suggest you watch it one piece at a time or check a transcript to be sure it's what you're looking for. I'd like to thank The Hypnotic Orchard for sharing it, so that I can share it with you.