Education, Training, and Courses
Learn Scrivener Fast is a course by Joseph Michael that helps you learn Scrivener...well...fast. Scrivener is a great tool, but can be overwhelming at first. This course helps with that.
Scrivener is the most extensive way to plan, write and edit. However, there is a steep learning curve, which is why I'd recommend the Learn Scrivener Fast course by Joseph Michael linked above.
Editing and Proofreading
Reedsy is an all-in-one marketplace to find editors, designers, and more. They also offer a ton of super helpful free tools, and the one I use the most is the book editor. Highly recommend.
Publishing and Distribution
ARCs (Advanced Reader/Review Copies)
KDP (Amazon) Publishing Analytics
Publisher Rocket is by Dave Chesson of Kindlepreneur. It is one of my favorite and must have tools for selling on Amazon by helping you find the right keywords and categories. It is super affordable and highly recommended.
Book Design Templates is by Joel Friedlander of Author Toolkits. Book Design Templates helps you create beautiful books right in Microsoft Word, Apple Pages, or Adobe InDesign. Other services include covers, interior layout, and more.