Assemble the poems you have completed. If you are to the point of considering a poetry collection, then you must have at least 50 pages of poetry. Initially, aim to collect even more poems than you need, as you will probably eliminate some of the weaker poems as you put together the collection.
Read your poems aloud and revise them thoroughly. A solid collection needs to have strong, well-revised poems. If possible, ask a friend to read your poems, attend a poetry workshop or use an online message board to make sure that your poems are all polished and complete. Eliminate any poems from the manuscript that do not hold up on their own.
Arrange your poems in order. Usually, a poetry collection consists of sections in which poems are grouped thematically or stylistically. If you do not want to thematically arrange your poems or cannot find a thematic arrangement, read your poems aloud to see which ones seem to "go together" in some way; it can be anything from tone to structure. Strike a balance between organizing poems with a "similar" feel and creating variation within groups. While you don't want to bore your reader with many poems in a row that seem very much the same, you do want your collection to be coherent.
Format your manuscript properly. Most manuscripts require a cover page in which you include your title, name, address and e-mail. The next page should include a table of contents, the page after should include a list of any credits where you published any individual poems and on the next page begin the body of the text. Put page numbers at the bottom of the pages and single space the individual poems unless your poem formatting requires you to do otherwise.
Look up publishers who are accepting poetry manuscripts and determine their guidelines for submission. Websites such as Duotrope and Poets and Writers allow you to search for poetry publishers and poetry contests.