My book is complete, however I don't know where to go from here? Pliz, some advice

"My book is complete, however I don't know where to go from here? Pliz, some advice"

This is one of the most common questions I get asked. Someone has finished writing and then they ask me "Now What?" "What do I do next to get my book published."

This will begin a series of posts on "what do I do to get my book published?"