One of the easiest ways to waste time with ChatGPT is to keep introducing yourself. You explain your project, your preferences, your goals and your writing style, get a useful answer, close the conversation and then repeat the whole process the next day.
There is a better approach. Rather than treating ChatGPT as a blank page every time you open it, think of it as a workspace that can be organized just like your computer. A few reusable prompts, a handful of reference documents and a little planning can dramatically reduce the amount of repetitive setup you do every week.