UPSC aspirants can best utilize online forums and resources by actively engaging with communities dedicated to exam preparation. Platforms like Quora and dedicated Facebook groups allow candidates to share experiences, resources, and tips. Participating in discussions enhances knowledge through exposure to diverse perspectives. Additionally, leveraging websites like Insights or Forum IAS offers access to study materials, current affairs updates, and important notifications. Engaging in online mock tests and quizzes can also facilitate self-assessment. However, it’s essential to remain discriminating in sourcing information to avoid misinformation, ensuring a focus on credible and relevant content.