YES!
For so long, I have been trying to find various ways to "close more tabs" but it seems almost impossible, these days. In a strange and twisted way, I have increasing appreciation for my father who'd go into the bathroom with a magazine for an hour... just to get some quiet privacy when I was a kid.
Unlike you, I SUCK at multitasking, and I pretty much despise when someone wants to put something new on my plate when I am already in the middle of something. I do my best work; my best creating; my best thinking when there is nothing else going on.
When I can find the TIME to actually block off several hours, my favourite form of relaxation is creativity... in some form... painting mandalas, or perhaps writing something.
It takes a lot of self control to just consentrate on that one important thing when there are so many distractions.