This box cutter tool, which is <$12 https://a.co/d/aOxoVOp. It makes opening packages so much easier. It doesn’t have a blade, so it’s much safer to use than scissors or a knife.
A better tool for basically the same price is a OLFA LA-X. It's a Japanese designed box cutter which has a retractable blade on one end and large dull metal pick on the other end for quickly stabbing packages open.
Plain URL for the more cautious/suspicious people :)
https://www.amazon.com/dp/B00M1XZXGU