One thing I keep doing is trying to lock the door at work with my house key. It’s like I know I have to perform the locking operation, but my brain has associated that too strongly with one particular key.

I definitely toggle the bathroom light – if it’s on, I *always* turn it off as I go in before I can stop myself. Doesn’t seem to happen with other lights. The same phenomenon causes me to neatly put away my weapons just as a bear charges towards me in Skyrim!