Self-hypnosis helps mitigate limiting thoughts that cause anxiety. All hypnosis is really self-hypnosis.
Most self-hypnosis is comprised of positive affirmations used in a way that focuses the conscious mind on a positive thought or outcome, for example, “Every day, I am productive at work.” This form of self-hypnosis is autosuggestion. Practice this for minutes every day with your eyes closed and envision what it would be like for you to be productive. Define it to your specifications.