Read the guidelines for the anthology in which you want to publish your work. The guidelines will indicate if there is a theme for the anthology, if you need to follow a specific form in your poems, and whether you can submit more than one poem for consideration. These guidelines are important if you want to write specifically for an anthology.
Write poems that relate to one another when possible. If the anthology you're writing for has a theme and allows you to submit more than one poem for consideration, write two or three poems that are linked to one another. Writing a series of poems focused on the theme of the anthology, that tell a complete story when read together, gives you an opportunity to showcase more of your work.
Incorporate literary devices such as metaphor, simile, and hyperbole to emphasize the focus of the anthology's theme. Metaphor is the use of one thing to represent another, simile is comparing two things, and hyperbole is the act of purposely presenting a subject in an exaggerated manner. Using these devices in your anthology poem is an effective way of centering the focus of your poems on the theme of the anthology.
Write similarly styled poems. If the anthology calls for sonnets, you'll write in the sonnet form, but if an anthology doesn't place restrictions on form, you may be tempted to write several poems to demonstrate your wide range of writing capabilities. This can often make your work look uneven. Consider using similar forms for poems that will be published in one anthology. This doesn't apply to an anthology that features nothing but your poetry. When you have a complete anthology of nothing but your work, you will want to vary the forms to keep the overall work from becoming stale.