Indie authors really can't take a 'day of rest'. Any day that we don't spend at least some time marketing our books can hurt us. Since we don't have the marketing budgets of big publishing houses, we have to make due with what we have available.
But we have to learn how to balance our full time job as writers with our full time job as marketing director. Sometimes we get so tied up with marketing that we forget to write! So maybe we need to set up specific schedules to do these two jobs, sparate from each other. Use the calendar on your computer or phone to set up reminders. Of course, if you are writing and the creative juices are really flowing, it's not a good idea to stop right then. So, allow yourself another 15 minutes to get to the end of what you're currently working on.
Sales of my books are less than I was expecting at this point in time. I was starting to get a little disappointed. But in talking to other authors, I realize that sales are low all across the board. In fact, one author's advice from her publisher was golden: "Don't worry about sales for the time being, just do what you love and keep writing!" Thank you, Rachel Stiber!