If being busy is the norm for you, as it is for most of us, it's really important for us to schedule down time, and usually Sundays are a good day for contemplation, reflection, rest, and relaxation.
It's also a good time to think about your plans for the week.
Often, we can get caught up in thinking about all that we need to do.
How about thinking instead "What do I want to feel?"
Maybe, you want more energy? Maybe you want to feel happier? Maybe you want to feel secure? Maybe you want to feel focused? Maybe you want to feel calm as you go through your week?
Whatever you want to feel, focus on that, and then make your list of actions what you need to do, in order to get there.