I've started compiling an I spy list of things I think I'll always see and then counting how many I get on each journey. I might end up adding to the list if there are things I've missed but I think it's not bad as a start and it keeps me entertained and noticing the world around me. In a few weeks I'll let you know how I did on my various trips but below is the list I'm starting with.
At least five church spires
Some one running to catch a train, and succeeding
Someone running to catch a train, and failing
Bridge (One point each for over a river, a road and the railway)