If your laptop has a touchscreen and you feel the impromptu need to scribble out notes, all you need is a stylus. If it doesn't have a touchscreen, you can turn to your tablet, and if you don't have a tablet, you can turn to your smartphone (and, of course, there are things like Wacom slates). None of those sound appealing? You can go the old-school route, but who wants to carry about paper pads and pens? Enter the whiteboard laptop sticker.