Ideas and thinking are great, but execution is also important for Understanding the shape of an idea (besides it’s even greater inherent worth).
The process of having to translate something abstract in your head to something concrete leads to tons of new ideas because that translation is almost always so much harder than it seems at first that you have to engage your System 2 more. There’s also just the fact that you have to sit with and play with the idea for longer during that process of translation.
If you have a particularly promising idea, try to execute it as quickly as possible in whatever medium is most important for it. Writing is pretty good for basically any idea, but you might want to expand further for different ones.