Aspirants can evaluate the effectiveness of their study plan for the UPSC exam by regularly assessing progress against set goals. Techniques like self-assessment tests, peer discussions, and review of past performance can reveal strengths and weaknesses. Adaptability in the study plan is crucial; candidates should be ready to revise their strategy based on feedback and outcomes of practice tests. Keeping a detailed study log and marking completed tasks helps maintain accountability. Ultimately, ongoing adjustments foster improved learning strategies, ensuring comprehensive preparation for the exam.