McGill University neuroscience professor and author of The Organized Mind, Daniel Levitin writes that most people can only hold about four things in their mind at a time. Most of us, however, have many more things that need to get done. We waste neuro resources on simply trying to remember these tasks leading to constant distraction and change in focus. This expended energy circulating a mental list and just trying to remember could be put toward other more productive processes and allow for greater focus.
You will find that when you put those four things (which often feel like 8 things mentally) on paper they become more manageable and less overwhelming. So make a list and then prioritize things. Research confirms you are 35-40% more likely to accomplish tasks and goals that are written down. More on list making, short term and long term goals later this week!