Two Things Times Two

Two things I find it impossible to do:
(a) walk slowly
(b) walk and read at the same time

Point (b) was inspired by being stuck behind a woman on the tube veering worryingly on the platform because she was reading and walking at the same time last week.

(some of my vintage Ladybird book collection)

Two questions:
(a) what is your preferred method of reading?
(b) what are the two things you can't do?

And one extra question that has been bugging me all week - do they recycle all the mounds of Metro's and London Lite's that are strewn around the tube each day and make them into new ones or is there a big papier mache ball factory somewhere?

Thanks.