I figured that skill in mindfulness meditation would help with sleep onset insomnia. Instead of getting frustrated at taking an hour or more to get sleep, you could just treat the time lying down as an extra meditation session. Hasn't really worked out with the sort of undisciplined and infrequent practice I've been doing yet. I still tend to get frustrated and go into a funk of discomfort after lying awake past forty or so minutes.

I wonder if the idea is worth pursuing anyway. Focusing seems more difficult when lying down, and might be bad enough that there just isn't much skill progress to be developed that way, but on the other hand there is twenty to ninety or more minutes of utterly unoccupied uninterrupted time there for every night when going to bed early.