A brilliant list of reminders from Lifehack.org:

1. Focus on improving yourself instead of comparing with others.

2. Say “thank you” instead of “sorry”.

3. Simply say “no” when you don’t feel like doing it.

4. Stand tall.

5. Exercise to keep yourself energetic.

6. Smile to strangers.

7. Sit straight.

8. Set small goals for yourself every day and record your achievements.