Track Multitasking Activities and See How Productive You Really Are
Many times you’re doing things in parallel. If you want to do your best you should really only concentrate on one thing at a time. There are, however, many tasks that can be done in parallel. Buying groceries and listening to an audiobook or a lecture. Doing 2 or 3 maintenance chores on your computer, switching between them when there’s a wait etc.
Have an online app that can track many tasks in parallel. You can start one task and a timer for it, then when you have to wait and switch to a new task you can start another timer for that as well. Both timers running in parallel until you stop them.