Choose a task with a visible finish line—one drawer, one sink, or one stack of mail—then set a realistic short timer. Use Pomodoro Timer if it helps you start, but do not turn the timer into a race that causes careless work.
When it ends, decide whether to stop or schedule another block. Put unfinished items somewhere intentional rather than scattering them. A completed small area is more useful than half-starting five chores.
What single area can you finish in fifteen minutes?