Here is a wonderful resource on learning how to think critically i.e. thinking for yourself and not just what others tell you to think.
Other devices that assist people with thinking include those referred to as part of instructional intelligence and include the use of mind maps and concept mapping.
These ideas represent new horizons for learning and a part of a worldwide movement towards more effective learning through more effective teaching and instruction: with a focus on how to learn and not just on the recall of what you've been told. What you can Google you don't have to remember!
More on how I link these educational tools and ideas to the application of instructional intelligence in the use of dynamism to assess ecomyths to follow.