• thinking positively and thinking negatively
• thinking in past, present and future time zones
• reasoning and logic; emotion and feeling
• creativity, intuition and imagination
• invention and innovation
• learning, change and development
• understanding, insight and wisdom
• concentration and conscious thinking
• dreams and subconscious thinking
• remembering and forgetting
• judgment, weighing up, evaluating
• analysing and synthesing
• thinking about thinking.