Aspirants can leverage e-learning resources effectively in their UPSC preparation by utilizing online courses, webinars, and digital libraries. Platforms like YouTube and educational websites offer free lectures and tutorials from experienced educators. Online forums and study groups enable interaction and discussion on complex topics. Aspirants should consider mobile applications that provide daily quizzes and current affairs summaries. Additionally, subscribing to e-newsletters can keep them updated on recent developments relevant to the syllabus. Tracking progress through online assessments helps identify strengths and weaknesses, allowing for more tailored study plans.