When it comes to useful websites, there are literally millions but we come to know only one or two at a time. Usually, we don't bookmark such useful websites for repeat viewing or to share with friends.
In this blog, I introduce to such useful sites whenever I come across. Makeuseof.com has been my number one source for this.
Today, just a few minutes before, I visited http://www.makeuseof.com/answers/
It is a one stop place for learning on diverse topics. It is similar to Answers.Yahoo!
While not all answers may be satisfactory, some would provide you real solution to your questions. It is a free web site where anyone can ask a question and anyone can answer.
The only drawback is the questions are not categorized for quick navigation.