human
What are some of the most interesting and useful questions that have been asked on a question and answer site?
assistant
Some of the most interesting and useful questions that have been asked on a question and answer site include: 
1. What is the best way to clean my hardwood floors? 
2. How can I improve my public speaking skills? 
3. What are some tips for writing a successful blog post? 
4. How do I start investing in stocks? 
5. What are some good ways to relieve stress? 
6. How can I learn more about photography? 
7. What are some healthy recipes for breakfast? 
8. Can you help me find a reliable source for information on a particular topic?