One technique for engaging in positive self-reflection is to

A) keep a gratitude journal.
B) explicitly focus on trying to be happier.
C) avoid failure.
D) acquire new possessions.

Keeping a gratitude journal allows for reflection on the positive aspects of one's life, which can lead to a more positive self-view and improved well-being. Option B is not as effective as it puts unnecessary pressure on oneself, while option C is unrealistic and can lead to avoidance behavior. Option D is also not effective as material possessions do not necessarily contribute to positive self-reflection.