I used to have an emacs setup which I ditched because I was tinkering with it too much. :)
I switched to Things 3 on Mac/iOS which I love.
Things 3 is both my GTD app of choice (it runs my life) and my inbox where I catch everything. When I have a random thought/idea I just add a new to-do in my Inbox. Then when I have the time, or at least once a week, I go through my Inbox and add more detail to the task, and try to make it actionable or store it for review at a later date.
I switched to Things 3 on Mac/iOS which I love.
Things 3 is both my GTD app of choice (it runs my life) and my inbox where I catch everything. When I have a random thought/idea I just add a new to-do in my Inbox. Then when I have the time, or at least once a week, I go through my Inbox and add more detail to the task, and try to make it actionable or store it for review at a later date.