Guardian Unlimited Talk is a great way to use up all that time that you might otherwise spend on work [sigh]
Otherwise, all the usual things. "If only my desk/bookshelves were a bit tidier I'd be able to work much more efficiently."
"I'll read this magazine until eleven o'clock then really get down to it."
"This sudoku/crossword will help tone up my brain ready for a good go at all that work waiting for me."
"Well, I can't work properly on an empty stomach, can I? Brain, oxygen, etc etc. So if I break now for a cup of tea and slice of cake I'll be able to work much better afterwards."