Got jumped by a Ghast while trying to build a fort in the Nethers. I got him, but he took out not only part of the floor I was working on right next to the portal, but also managed to extinguish the portal itself. It relit just fine, but since I'm not seeing any flint or steel over there... pack accordingly. tl;dr - always pack a flint and steel when crossing over.
It keeps you from accidentally throwing valuable objects away. I've been doing it for years so I felt like it would be common, yet I still see youtubers throwing things on the ground all the time. Hope this helps someone.Edit: For everyone who has tips such as don't suck. I saw Etho throw an item in his latest video, and he is undoubtedly really good at this game, PvP included.
It is faster and saves your sword from being wasted on an irritating Obstacle