How to handle ideas for further exploration (opens in new tab)

Occasionally I have ideas or come across articles/book titles that I know I'd like to explore further for a given project, but right now is not the right time for them, usually because I'm in the middle of another task. I want to: -keep track of avenues that I'd like to explore further so that I can... -surface them at the right time (ie, when I'm working on this project, and not another one, or when I'm focused on following a different trail in this project). I'm curious how you all handle t...