Get your thoughts out of your head and onto paper. Make them real. Make them tangible by putting them on paper.

Do they still seem important?

Thoughts are changed somewhat when they're tangible.

They stop being random undefined stuff rattling around your mind being repeated and amplified.

They become something easier to make decisions about and act on.

You can share them with someone else. You could also do that verbally of course.

When you let thoughts out, they become ideas.