With all that responsibility, it's easy to lose track of what's important. If you stress about each task equally, you'll end up doing none of them well.
To help clarify your vision, here's a little reminder:
Your #1 marketing goal as an indie author should be to build your email listWhy? Because countless studies have shown that a subscriber on your email list is FAR more likely to take a requested action than one of your social media followers. In other words, when you announce a limited-time sale on your newest book, you're going to get the best results (at least in terms of percentages) from your email newsletter.
This is increasingly the case as social platforms like Facebook make it more difficult to reach your followers without paid advertising or promotion.