If you're staying at a hotel in a busy city centre, light pollution can be a serious issue. Even the tiniest crack in your curtains could illuminate your room well beyond comfortable sleeping levels. So: Head to your closet.

With young kids, bedtime routines usually involve a precise checklist of putting on PJs, brushing teeth, reading stories, asking for water, getting tucked in, realising Bunny is missing, going on a mad search through the house for Bunny, getting tucked in again, saying oh wait! I have to use the potty, getting tucked in again, and giving goodnight kisses. And then, at long last, the lights finally go out.