Another item of great importance for a writer is the creation of a number of professional bios. Even a first time writer needs to have several bios prepared and ready to go.
A bio is more than just the rattling off of who you are, what you write, and whatever credentials you might have. Those things are all important, of course. But various audiences for your bio are interested in reading different aspects about the writer.
My article Writing an Author’s Professional Bio should be carefully read by authors, particularly authors just getting started in the process of promoting themselves. I have provided examples using my own various bios.