Writers' Block

The more often I engage with the art of literature, the more I find writers' block to be equally inconvenient to a bad case of the sniffles. Most people grow up being told "write what you know," and this is something that pops up at least once a week for me. Actually, I'm having a problem with it right now. Sometimes it helps to sip a cup of hot tea with cream. Others find inspiration during a hot shower. One time I was told by a charming young writer "my best ideas come to me naked." I very much would like to know what you do. Sometime sketching relieves that appropriately named "block" from my brain, as does jogging and stretching. Every now and then a stubborn entity feels the need to block my creative flow and all focus dissipates. It seems like the little flashing icon that the letters sprout from upon the screen (I'm over tired, please don't mind me) is telling me to hur-ry hur-ry. First of all, that is simply rude. Second of all, I find I preform at my best the second an assignment is assigned. I am also curious to know, those of you who preform under pressure, what specifically makes that your preferred method? And does it always work?