Hi and welcome!
It's hard. It requires you to find a person with at least a similar intellectual level and even better if he is superior and you can learn from him. In that sense, some of the men are true teachers, and I mean it sincerely. I don't know, maybe it's their historical heritage that they tend to be more rational instead of intuitive like us; the thing is, we give more importance to feelings.
But the problem is also that so far I have only found two that meet those requirements. The first one at least served me to unfold the general argument of the saga that I am writing and it is always a new source of ideas, it is necessary to see him again every time I am stuck. Although the phenomenon in which this occurred was remarkable. We first came up with an idea (well, all of Deep Impact and Armaggeddon was in vogue in those days) around the need to build an ark ship in front of a comet, etc., the same idea from those two movies. Then I think it occurred to me to ask him: "What if it was only men who die?" Then I was stunned with his answer. He told me: "Keep the idea of that ark type ship, it is the only one that has the route to a planet. And do not use the threat of a comet, but of a virus, a weapon, which does not affect children under certain age. And the question is which is more important: what do you prefer, save the children, or take over that ship and the route to that planet? There you have a war. People will always kill for something like that, and others will want to protect those children."
After that I naturally asked for the bill: I needed to rush out to write; but my dear friend, well ... You guys are wonderful until you stop using your brain, you know?
Lately I have developed a brainstorming system but based on chaos theory. Two tools: a folder with at least a thousand photos and a coin. That is the universe in which I find characters, the direction in which they should go, according to the number of the day of the month or the page where it is originated more draws with the coin and thus I am solving everything, even that the original protagonist dies in the middle on the way and the relay is taken by someone else. It is a system that until now continues to throw me surprises of ideas and arguments that I could never have imagined precisely because I never know in which direction I will go. Chaos. Random.