If you are a poet and you are yet to come up with the best poem of your life, then let me tell you that there is no such thing as the best poem of your life. As long as you live, you will continue to write and you should make sure that your new poem is better that your previous one. There is no poet in this world who can claim that he or she has written his or her best poem. This is because we are human beings and human beings are never satisfied.
However, this does not meant that you should give up writing great poetry because your aim should be to continue to write poems that are better than the previous ones that you have written. I would recommend you to express your thoughts and feelings in free-verse style instead of making the lines rhyme. It is not necessary for you to be a Shakespeare to write good poetry because as long as you have your inspiration and are willing to make a little effort, you will be able to pen down great poems.
When you are writing a poem, what you should remember is that it should come from your heart. How can you expect a poem to be good if you have not written it from your heart? When a person reads the poem, he or she should be able to feel what the poet felt at the time of writing it. Your poetry should be personal. I personally feel that a poet can not write a good poem if it is not personal. You can write about what you are thinking or feeling. For instance, I always write poems that are related to the happenings or events in my life. You can do that too.
First of all, you need to find out what subject you want to write on. If you are in a romantic mood, then write about love. On the other hand, if you are in a sad mood then you can write a sad poem. After you have written the poem, read it out aloud and then feel your poem. Yes, you need to feel your poem. Do you feel anything after you have read the poem? If you do not feel anything then the poem is probably not good enough. In such a situation, try again until and unless you feel the emotions or feelings after reading it. Put your feelings in to words.
Last but not the least; you should not force yourself to write. You need to understand that you need to have the necessary feelings and inspiration to write. If you sit down and write a poem without having any feelings, you may not be able to come up with a good poem. You should never force yourself to write.