This is what my "Virtual Desktop" pager looks like right now, a more or less busy average Sunday night.
That's 3 separate "jobs" open concurrently AND taking care of a task for someone who just pinged me in IM. Normally there are maybe 2 or 3 more projects open. That gets a bit much though.
This is how I work. It's how I have been doing it for 4-5 years. Sometimes, if I seem distracted...
I'm not saying it's a great thing. It has serious shortcomings and sometimes it drives me nuts. But what can I do? ;)