Origin of ideas

Came accross this information about the world’s top ten ideas being generated in the following places

1. In the toilet (no. 1 on the list)
2. While commuting to work
3. In a boring meeting
4. While exercising
5. Waking up in the middle of the night
6. While listening to a church sermon
7. In the shower
8. While falling asleep or waking up
9. While performing manual labour
10. While reading for leisure
    

I for one will pick no. 10 as my most effective period spent generating good ideas. What is yours?