Things you do for no apprent reason..

[Spicoli]

Make sure your flies/zipper is up when you know it is.

Check the door is locked when leaving the house ....three times

Click my hammer toe against the floor through my shoe...really bugs the Mrs

Check the heating is off.. at least three times

Check the front door is locked after having already locked it at night

Say excuse me if I belch or something even when nobody is there

I could go on but think I have already said too much

First just proper hygiene bud . I had a number thing as a kid, had to count-check things 5 times like light switches, doors closed etc. ocd for sure.