I find certain familiar TV shows playing at moderate volume can greatly help my own problems getting to sleep. For me it's Futurama, 30 Rock, Star Trek: TNG, and Good Eats. All things I can consistently enjoy watching over and over, with a minimal amount of high dynamic range (i.e. no shouting), and things that don't surprise or grab attention. Sleeping with a partner that has trouble getting to sleep at all with something on has made things a little more difficult.

That's step one, step two is getting to sleep at the same time every night, taking care to _not_ stay up into the early hours or sleep in, and general human maintenance. It's still not perfect, or sometimes even very good, and I'm afraid it'll always take care unless I make lifestyle choices that make me always tired.