Perfecting the plan
If you have so many things to do in one day, just write them all down on a piece of paper and look at them. Sort out which ones need to get down and take priority and then it will be easier for the other, less important clutter to disappear smoothly.
The last thing you want to do is waste your time with tasks that are not actually as important as you once thought they were. Then by the time you get through them, the major things are still lingering around and waiting to be completed, causing stress for you. Just remember, a plan is your friend.