Holiday let owner (and cleaner) so slightly different but for me:
Departure instructions followed (e.g. windows open/closed as specified, whether to strip beds (I actually like sheets/towels folded as easier to transport and I check for stains back home), bins emptied, washing up done/dishwasher on etc)
Sort the bins (refuse/recycling) per instructions - it's a really grim job to have to do this retrospectively
No skids in the toilet
A basic level of clearing up after yourself (if you spill jam, wipe it up, don't leave egg splatters all over the worktop etc).
And because I am an owner (a cleaner probably wouldn't be bothered) show that you have respected the cottage - hard to pinpoint what I mean, but my heart sinks a bit when I arrive at my cottage and find furniture moved around and not put back, the bed left cumpled as if you've just stepped out, towels on floors/draped on furniture, cushions on floors, plates/cups left in bedroom. It's nothing that can't be easily sorted by me, but it just suggests a lack of respect for my very much loved cottage, that makes the whole changeover feel depressing yes, I know I'm being precious!)