Here's the dirty little secret I've picked up about successful business people - they have mastered the art of not just figuring out what the most important tasks are but, and this is key, figuring out which needed tasks to drop off.
I don't claim to be a paragon of business. But I am coming to understand that each day, there are things that need to get done that I simply cannot get done. I haven't fully made the transition to doing this optimally as I still end up trying to do more things than I can realistically do with the resulting "half-assed" results. But I am getting better.
Each day I receive requests to do this or that or come up with tasks that will better our business prospects. And each day I'll look through those tasks and see that many of them simply cannot be done in the time required. Maybe it's an interview. Maybe it's a skin that I need to do. Maybe it's some code I need to write. Maybe it's a product evaluation. It's different each day.
I wonder which things I won't be able to finish up today.