TL;DR: This multitasking Dyson upright vacuum retails for $399.99, but you can get on sale on Amazon right now for just $289.99.
Crushing your to-do list feels great, sure, but all that multitasking can take a serious toll on your intellect: Studies have shown that people who multitask during cognitive exercises experience a drop in their IQ score on par with people who pull all-nighters.
But it's not just your brain that suffers when you multitask; your career can take a hit, too: