When I was younger I used to count stairs.
I mean I couldn´t climb stairs without counting them.
any stairs, anywhere.
there were 8 stairs on every floor in our building, 13 and then 3 going out from the parking, 3, 4 and 3 to the supermarket. my grandparents house had 8, 10, 9 till their apartment. old building.
I remembered all the stairs all over my neighborhood, my school, friends places, etc.
some call it Obsessive Compulsive Disorder. people really suffer from this, spending a fortune on psychiatrists trying to "kick this habit". I didn´t need any of that. I cured myself when I realized it was disturbing me.
instead of counting them I trained myself to say "ta ta ta ta".
it was hard at the beginning but now it works perfectly. for more than 15 years. I don´t even feel a need to count them, as long as I go ta ta ta ta ta ta ta ta ta ta ta ta ta ta ta ta ta ta ta ta ...

( for further information visit OCD foundation at :
http://www.ocfoundation.org/, next week more about GAD (Generalized Anxiety Disorder), visit :
http://www.algy.com/anxiety/anx.html  ).

have a quiet week.