Weird habit:
when house sitting for friends in summer I like to watch the UK ghost hunting series Most Haunted before going to sleep. It's sort of a guilty pleasure, I fully admit I like watching ghost haunting tv programs, but Most Haunted is just so, to use a British term,
naff (the first definition of the word).
I also seem to read a long(er) historical novel during those weeks. I just started the second book in the Matthew Corbett series by Robert McCammon.
During vacations I like to read horror novels, though the last couple of years I've been reading more and more of those in general.
I used to reread Stephen King's It every summer, though since I've gotten an ereader and more easy access to books I like I've read It just once.
It funny how a certain time of the year, place or situation comes with a certain habit/ritual.