... or anywhere else for that matter:

1.  The black pepper grinder
.  I can't even find it behind the cooker.

2.  The TV remote.  For god's sake!  Electricity saved, though.

3.  My Tax Return.  Oh, unbelievably, I sent it off in September,

4.  A plot for my new novel.  I lose the plot every day.

5.  An unknown unknown.  A fifth missing thing, yet to be identified.  Possibly the tags that BCUK have conviscated for a while.