What time is it? If you have trouble getting back to your cubicle on time, simply set this Will Return Clock (yes, it looks just like those ubiquitous "will return" signs ... but with a clock) fifteen minutes ahead
... That way, you'd never be late!
http://shop.neatorama.com/product-info.php?will-return-clock-pid532.html
(Psst ... you may want to pluralize "sign" in the first bullet point of your description.)