Improving speed and accuracy in UPSC exams can be achieved through regular practice with mock tests and time management techniques. Candidates should simulate actual exam conditions to develop familiarity with the time constraints. Utilizing techniques such as skimming and prioritization for difficult questions can enhance efficiency. Additionally, practicing previous years' papers aids in understanding question patterns and improves response accuracy. Developing shortcuts for calculations and summarizing key concepts can further streamline the examination process, helping candidates maximize their performance within the allotted time.