Using a dry-erase board can significantly reduce paper usage while solving problems, especially if space allows for a larger board mounted on a wall or a suitable table. Many users find that while whiteboards are efficient for practice, it's still beneficial to transfer some work onto paper for later review. Additionally, the tactile experience of using blackboards or greenboards is appreciated by some, as it adds a meaningful element to the learning process. Overall, transitioning to whiteboards or similar surfaces is recommended for a more sustainable and efficient study method.