Things I've done recently:
Initiate conversation with next-door neighbour, revealing in-depth (if incorrect) knowledge of aircraft systems, the many interesting ways in which they can fail and the many fascinating consequences thereof? "Of course, they've fixed the fuel pump problem on this series, but if we did lose an engine now we'd probably divert to Toronto if the weather hasn't closed in. If it has, things get hairy... er, you OK?"
Persuade yourself that the seat-back LCD screen is in fact displaying the thoughts of the person sitting in front of it.
Start writing a novel.
R