I believe most people fail to accomplish goals because they don't break them down. If you want to read 20 books this year, you need to find the first book, read the first chapter, etc. It's about breaking down the biggest item into the smallest step you can take forward — you may call this the "next action".
But you also don't need all the steps at once.
When I work on a new project or goal, my only initial step is to determine what is the one next thing I need to do. That's the most important. And when that's done, find the next one, and the next one, and so on and so forth.
Break it down to the single smallest unit to move forward.