Work your way through every task slowly and carefully because this is going to allow you to get where you want to be personally and professionally. When you work with one task you’ll be able to devote all of your time and energy to that one task. You can also be sure that you have enough time and attention to devote to the task.
If you spend a set amount of time on one task you will actually spend more time and effort trying to do several things at once. That’s because you have to spend some time working hard at your tasks and you’re likely to get confused when you’re trying to work from one task to a different one. Instead, complete the first task completely and then move on to the next task. You can then devote the same type of attention to the next task.
I made a to-do lists and now ticking off the things I have accomplished.. I finally got all the jobs done.. It feels better when I accomplish day's goal as if I had a fruitful day.
I block time, and never take responsibility of few things together. I make sure that I can concentrate on my work and don't mess it up. It ensures quality.
I guess that is why some say to avoid multi-tasking. I accept. I was having 3 projects in hand - I was communicating with three clients working hard. But everything got wasted, when I mistakenly emailed the wrong report to the wrong person.