Candidates can develop a thick skin against criticism during preparation by cultivating resilience and maintaining a positive mindset. Seeking constructive feedback and viewing criticism as an opportunity for growth can shift perceptions. Building a support network of peers can also help aspirants share experiences and gain encouragement. Practicing self-compassion allows candidates to acknowledge imperfections without being discouraged. Moreover, setting clear personal goals and focusing on self-improvement can help individuals remain motivated in the face of external criticism, enhancing overall confidence.