Things that let me know I am getting older

1. Smile lines
2. Most Olympians are younger than me
3. Learning from my mistakes
4. Putting money in a retirement fund
5. Grey hair
6. Being friends for 20+ years
7. Admiring the idealism of youth
8. Saying things like "kids these days..."
9. Going to bed by 11pm
10. Avoiding foods that upset my stomach

What things remind you that you're "growing up"?