(Doffs hat + blush)
Lately I've been finding it harder and harder to clean out my head. So much film and music assumes a really low common denominator and consequently leaves almost nothing to the imagination. Every moment of every scene is stuffed to the gills with some kind of ADD satisfying sting or lense flare. The camera shakes, the low-end quakes, and my head begins to ache.
So I've been gravitating more towards music and film designed to provide a basis, and foundational texture that let's my imagination do a bit more work. Check out some Gavin Bryars, especially Jesus' Blood Never Failed Me Yet. It's really slow and quiet; great for an hour of chillout. Autechre is pretty magical for that too.
Then of course there's the old standby of Music for Aiports by Brian Eno. That'll clean you up good and proper. Especially coming off a kids show, which tend to be totally frenetic and overstimulating.
For movies try Solaris, or Snow Angels. I watch a lot of documentaries too, they tend to give you a little more brain space.
But maybe you just need a good ol' walk in the park.