Hahaha!! It does seem that we all do believe in such things..

My mom gave me sth sweet to eat (mostly dahi-laddoo or sth like that) in my school days...
Used to have some lucky charms:: lucky pen, lucky shirt.. Even I've heard of a bad-looking tie succeeding in placing 17 candidates in my senior batch..

For some time now, ( i.e. in last 2 years or so on occasions like job interviews, GMAT-day etc)I've restricted this mostly to morning prayers or a maatha-tekna in the nearby mandir..