Finish and polish your manuscript
Revise until the book is as strong as possible
Get feedback from beta readers or critique partners
Hire a professional editor if needed
Research your genre and target audience
Decide between traditional publishing and self-publishing
If traditional publishing, prepare a query letter
If traditional publishing, write a synopsis
If traditional publishing, create a book proposal if required
If traditional publishing, research literary agents
If traditional publishing, submit to agents or publishers following their guidelines
If self-publishing, format your manuscript for print and ebook
If self-publishing, design a professional cover
If self-publishing, choose publishing platforms
If self-publishing, upload your files and metadata
If self-publishing, set your price and distribution options
Build an author platform and online presence
Create a marketing plan before launch
Gather reviews and endorsements
Be persistent and keep submitting or improving your book