Classic Hitchcock movies. Simply because you would probably watch contemporary movies if you were not on holiday, and would never get the chance to watch (or rewatch..or re-rewatch) Hitchcock’s masterpieces. If you load your laptop with only those, you’ll be forced to watch them.
I love to binge on TV series DVDs. I have watched the entire series of Buffy and Firefly multiple times. Or find a new TV series that interests you and take 2–3 seasons; watch them back to back.
I second the movies and TV series idea. And an ebook.
Edit: oooh and if you have been wanting to learn a new language…some audio books? :D that’s what I would do anyway, since I always want to learn a new language or brush up on the ones I don’t use as often.
@tiny: it’s pretty easy to get bored in a place where the entire country’s population is less than 50K…..one of the reasons I left in the first place;) Trust me, I will have downtime!