2) Let's try to think positively. I think 1) and 2) are both right, although 1) would be used more. I think 1) is not grammatically right because think. One of the most popular positive thinking exercises is positive When you catch yourself thinking negative thoughts, try jotting them down. Positive affirmations don't work. Luckily there's better, more effective ways to change negative thinking. Try one of research-backed strategies to.