How many #1 priorities can you have?

I saw a slide in a presentation today that made me laugh. The title said something like "#1 Priority". In the body of the slide were 8 bullet points.

I see this happen all the time at work where there are multiple "#1" priorities. It's really impossible to have more than 1. You can work on more than one thing at a time, but when push comes to shove, something is the top priority. And frankly, you shouldn't work on too many things at once. You get less done overall, even though you *feel* like you're doing more. It's very dangerous.

Of course, I'm really bad at this myself, especially at home. Recently I was installing track lights, a project that had been taking a few days, and I had a set of shelves waiting out in the garage to do, and I was printing/matting pictures. There was no way I was going to get through it all, but I was still tempted to buy another set of lights to install in the garage. I didn't, but I was tempted.