Nowdays, if a thought pops in my head while I'm laying down in bed, I'll just get up for a second and write it down. Feels so good.
This article https://hamberg.no/gtd/ articulates the idea pretty well:
> When your system and your trust in your system is in place, your subconsciousness will stop keeping track of all the things you need to do and stop constantly reminding you. This reduces stress and frees up precious brain time to more productive thinking—maybe it even saves real time so that you have more time for ballet lessons, painting classes, and roller-blading.