Practice analytical thinking as often as possible. This involves mentally breaking down a structure and examining its parts. For example, consider a charismatic person and try to determine how her personality traits compose her overall charm. In addition, always look for patterns and use them to make predictions. You can find patterns while watching television shows, reading a book or reflecting on specific behaviors of people in your life.
Rather than being a passive listener, learn to question information given to you. You should especially question statements that involve "never" or "always." For example, if someone claims, "Humpback whales never feed in the winter," you should conduct your own research before accepting the statement as a fact. Not only will this strategy develop critical thinking skills, but it will also prevent you from blindly following your peers.
Be creative. Write fiction, sketch images and make music. When you're finished, look for connections between your work and the works of others.
Work in a group setting and hold discussions with peers. By listening to the opinions of others, you will learn to explore alternative perspectives and practice objective thinking. If you follow a certain religion or belong to a political party, open your ears to people on the other side of the fence.
Learn to reflect on your own long-held beliefs and habits. Challenge yourself by exploring your own weaknesses and oversights. You might be surprised to find hidden biases or preferences.
Play games that involve logical thinking. Chess, for example, requires you to form a plan while anticipating your opponent's next move. Riddles and brain teasers are other options to improve your critical thinking.