The human brain is highly volatile. It wanders here and there in no time. So, maintain focus on the subject rather than drifting away to some place. It happens to me very often. Control the flow of your thoughts. Otherwise, the poem loses its essence and confuses its reader. It creates an impression that I am not sticking to the point.
I don't write poems for the audience or for my readers. I write them for myself. I have to be happy and proud of my work. It doesn't matter whether others like it or not. That's what poetry is all about. Feeling happy for oneself. If you are trying to impress others, you are just ruining it because you never know what's on people's minds. Having said that, here is a word of caution: even if your vocabulary is world class and keeping in mind a reader with fairly good knowledge of English, avoid using words which require dictionary to be kept beside your poem before reading it.
Finally when the skeleton of my verse is looking good, its time to arrange the words and lines properly in a desired order. It must look like a short story with head and tail. Now this task is going to take some effort. In order to make it sound good, you will have to replace words with more appropriate ones which precisely suit the vibe surrounding the idea of the poem. You may also have to move the lines or stanzas up or down to connect your story nicely. Once I believe that everything is set, I read it over and over again at few times until I certify: "Yes! This is it! It is now breathing life!" It requires few finishing touches like a sculptor working out delicate details on his masterpiece. Phew! Cool, its ready to be published.