Don't write down all the little things that are already in your system or items that are already part of an habit.
another thing is to batch work. What items on todo are admin? put them on the same list and do them at a set time you choose. These sorts of tasks often involve a different mindset from your other work and doing them in one set period is actually more efficient… number or circle togetger in order of related types of tasks (pay bills, e-mail, sort), set a time limit, make some nice tea or coffee, and only do that time. By batching you reduce the overwhelm that inevitably happens from switching between tasks or different types of operation medium (email account? bank account?) each time. Websites seem easy, but each page does count as a separate mediums for your attention.