This document summarizes five journal entries by a student about cognitive biases they observed in their own life:
1) The student exhibited self-serving bias by taking credit for exam success but blaming teachers for failures.
2) The student's parents worried about flying after the MH370 incident due to the availability heuristic.
3) The student's mood affected how angrily they reacted to an incident, showing the effect of mood on cognition.
4) The student formed a positive initial impression of someone based on their appearance and politeness, showing the halo effect.
5) The student's friends sought evidence that supported their existing phone preferences, showing confirmation bias.