Your brain is not a recycle bin. Filter the information passed to your brain. When you allow too much information at once, your brain opens a door for the subconscious mind. As a result, useless thoughts may control your mind. You will feel fatigue by only thinking of your duties, even if you didn't do any of them yet.
Organize your ideas into sections to clarify your aims.
When you organize your ideas you make the process of taking decisions much easier.
When you write your objectives, your mind will make a flow of information. Hands and brains are connected together, so you may write ideas that weren't clear in your mind before writing them.