You can really only be doing one, but I track several and shift attention to one or another as needed, but I try to minimize context switches. They are expensiv

You can really only be doing one, but I track several and shift attention to one or another as needed, but I try to minimize context switches. They are expensive. In practice, I track 3 or 4 long term projects, and I'm dealing with 2 or 3 short/medium term ones. But there's always only one that's the most important at the time. I try to give each at least a day of full attention at a time, and there are some days that are just planning and checking what's going on on the ones I've been ignoring with little progress in a specific project. The trick is learning to not stress out on what you're not doing. If you're going to be great at something, you need to accept that you'll suck at something else. You don't need to do everything, prioritize, prioritize, prioritize! Understand what's really important to the company. Failing to do something inconsequential is fine, nobody cares.