Choose a theme. Just like a sonnet, a sonnet corona explores a particular theme. However, since you will need to write seven sonnets versus one stand-alone sonnet, the theme must be broad.
Outline the sonnets. In a sonnet corona, each sonnet usually addresses one aspect of the theme, so you must also be able to divide the theme into pieces. The individual sonnets must be ordered in a way that makes sense, whether chronologically or topically.
Pick a rhyme scheme. While there are a number of established rhyme schemes for sonnets, you can also invent your own. However, all seven sonnets in the sonnet corona should use the same theme.
Pick a meter. Shakespearean sonnets are famous for their iambic pentameter meter, but once again, you have a little flexibility with the rhythm you choose. In the end, every sonnet should at least have the same amount of syllables per line, even if the rhythm is not as strict.
Write the sonnets. The goal of any first draft of writing should always be to get your thoughts on paper. For a sonnet corona, penning the seven individual sonnets according to your decided rhythm and rhyme schemes is the first step. Worry about connecting the sonnets later.
Connect the sonnets. The sonnets in a sonnet corona are physically linked together, not just thematically linked. The last line of each sonnet is repeated as the first line of the next sonnet; the first line of the first sonnet is repeated as the last line of the last sonnet. In this way, the sonnets are bound together, completing the sequence of the sonnet corona.
Create a title. The title of the entire sonnet corona should address the theme; traditionally, the title would include the form of the poem, but you don't have to follow this rule. You can also title the individual sonnets, but this can break the flow of the piece as a whole.