The only way I found that successfully dealt with the whole To Do/ Tasks/ Lists farrago was to get rid of them altogether.
No system, no lists, no problem.
I used to waste so much time faffing around with all sorts of apps and systems to absolutely no avail.
I find the things that really do need dealing with urgently tend to stay circulating in my head while the rest get automatically sorted by my mind without me having to do anything.
The things I remember get dealt with as and when, and what gets forgotten isn’t a problem anymore.
It’s not perfect but overall the benefit of all the time gained by not having to manage a Tasks/ Ideas system definitely outweighs the odd occasion when something does fall through the cracks.