_Google the opening lines._ Sometimes you can find the author by searching for the first few lines of the poem in a search engine. This is especially likely to work if the poem is well-known or if it has been published online.
_Use the Google Advanced Search_ to restrict the results to one domain. This can be helpful if you know that the poem was published in a specific journal or on a specific website.
_Check poetry anthologies._ If you don't know where the poem was originally published, you can try checking poetry anthologies. Many anthologies include information about the authors of the poems they contain.
_Ask a librarian._ Your local librarian may be able to help you find the author of the poem. They may have access to resources that you don't have, such as books and articles about poetry.