“Work on the project” asks you to make a fresh plan before you can start. A visible next step gives you a place to begin.
At the end of one work period, write a sentence for the next one. Make it small enough that you could do it in ten minutes. “Open the draft and write the three questions the reader still has” is more useful than “finish the article.” Keep the sentence where you will see it when you return.
This is a suggested practice, not a claim that it always saves time. It may help most when restarting is the hard part. It will not solve a project that needs a decision from someone else; in that case, the next step may be to request that decision.
Your action: Before you stop one task today, write its next visible action. When you return, try that action first. At week's end, ask whether you started more easily or need a different kind of reminder.
The 15-Minute Time & Attention Audit can help you notice whether restarting a task is a repeat drain.
A question for you: What project would be easier to resume if its next step were already written down? Reply to the Field Note with one sentence if you like.