Try not to have two things requiring your immediate attention at the same time.
Always choose one. Keep it front and centre as you dedicate your full energy to it. Push the other (or the others) to the background, silencing its pressing requests. Once you have completed a meaningful part of what you have selected first, only then move your full attention to what is next. Repeat.
Sometimes you are so busy that things keep taking turns in your field of attention. You complete a task, move on to a second item, go back to the first to continue to the next milestone, begin with a third to take it to completion, switch to the second to progress it some more, and so on. If feels like you are dancing.
That’s the incredible feeling of working in sequence.