You're getting the new Galaxy S8, yeah? Or maybe a Galaxy S8+? Yeah, sweet. Me too. Don't be an idiot and smash it. Buy a case and a screen protector. One of these ones.
Hardcore anti-drop cases is what Tech21 is best at, and we've used and loved its Evo series of cases in the past. Starting at $49.95 for the Evo Check and Evo Tactical and topping out at $109.95 for the Evo Go, there's a bunch of different options on offer. If you like the look of your new phone, but still want to keep it mint, Tech21's Pure Clear case is apparently "significantly more transparent" than any other clear case out there. It also has a $39.95 screen protector curved to fit the Galaxy S8/S8+'s sultry dimensions.
Budget accessories brand 3SIXT has a bunch of different cases and covers and folios and protectors for the Galaxy S8. Cases from as little as $14.95 (Jelly Case) up to $39.95 (NeoCase) will come in handy, while the brand also has plastic ($19.95) and glass ($34.95) screen protectors. You can find them all here.
Incipio is part of the 'Designed for Samsung Mobile Program', apparently, and that means it has a swathe of new cases for the Galaxy S8 and the larger S8+. Optus, Harvey Norman and JB will stock Incipio cases starting at the $24.95 Core Series NGP Case up to the fancier Design Series for $49.95. You can find all those Galaxy S8 cases here and those Galaxy S8+ cases here.