If you're new to yoga, here are a couple of easy and quick poses that you can try.  All of these can be done by people of any age or physical ability and fitness level, so get yourself a comfy area rug or mat and give it a shot.

Also, try to keep close to your bed so that you don't have to traipse up the stairs or all the way across the house before easing into slumber.

Hot baths are used by various people with insomnia to assist with sleep, in particular people who have complains of insomnia and difficulty falling asleep.  The idea is that you heat core body temperature up a little bit before bedtime which then, when you get out of the bath, leads to a kind of relatively more-rapid decline in body temperature, which is thought to then assist with sleep-onset.  There have been studies showing that this has been effective, particularly in older insomniacs.

Sounds like you're on your way to better sleep with a new sleep apnea breathing machine and your dedication to treating your bedroom like a sanctuary; both of which are great starts to more restful nights. Some more tips for a more restful bedroom are: