Addicted to sudoku? A handy Excel template makes it easier to track your working for more complex versions of the globe-straddling number puzzle. Yeah, we know -- doing a sudoku is hardly productive. On the other hand, getting to a solution quicker might just get you back to work. Just open the template, copy the numbers over from the puzzle and use the small squares to track possibilities.
You could also print the template for paper working if your preferred Sudoku provider doesn't offer enough room. The template is free to download, requires Excel 2007. (As ever, Firefox users have to go through hoops to download templates from Microsoft's site. Thanks, Redmond.)