Select a theme or subject. The theme or subject will evoke various feelings and multiple thoughts. Base your theme on an emotional tie, such as poem about one's mother, or base the theme on an abstract thought such as freedom.
Write or type vertically the word which encompasses the theme or subject you select. In simple acrostic poems, one word will suffice. However, there is no limit in the number of words you select. A double acrostic on a "dutiful mother" or a triple acrostic on a "loving, dutiful mother" are both viable options.
Use one capital letter per line. It is not necessary to bold or italicize the first letter. To bring attention to the poem's form, mention it in the title. Entitling a poem "Mother, An Acrostic" is an example. However, this is not necessary.
Incorporate the theme or subject in each line of poetry. This is the tie which binds the poem together. An acrostic poem does not need to rhyme and does not have a required meter. However, each line of the poem should bring the reader back to the theme and allow the reader to clearly interpret the poet's intent.