The best acronym for self-generated FEAR is False Evidence Appearing Real. The mind tends to persuade the subconscious that the false evidence is real. Generally, the outcome is inaction. Due to fear, no risk is taken, no plans are laid, and no achievement is gained.
The trick is to act in spite of the false evidence being real. The trick is to acknowledge that the FEAR exists and still take the risk, lay a plan, and seek to achieve. When you acknowledge that what you fear is a possibility and you are brave enough to face that possibility, you become much more fearless, and your sense of fearlessness tends to lay the path to success.
Let your self-generated FEAR be the motivation that moves you forward not the anchor that keeps you still.