Lesser-known but effective study techniques for UPSC candidates include the Feynman Technique, which involves teaching concepts aloud to solidify understanding, and the use of mind maps to visualize relationships between topics. Another technique is the Pomodoro Technique, which encourages focused study sessions followed by short breaks to maintain concentration. Additionally, creating flashcards for important terms can enhance recall and retention. Collaborating with study partners can also introduce diverse perspectives, making the learning process more engaging and multifaceted, ultimately benefiting exam preparation.