Write bad poems nobody will read. Sometimes the only way to find out what you feel is to try rhyming it.

A feeling stays vague until you try to put it into words, and then it has to pick a shape. The words are mostly bad and that does not matter, since the point is the sorting that happens while you look for the next line. Half of what you find out arrives in the attempt.

Give it ten minutes with no intention of showing anybody. Write badly on purpose, since good is not the aim and worrying about good stops the process. Keep it or tear it up, and either way you know more than you did.