Rolls and Rolls and Rolls

In order to clear up confusion between New/Old Editions and arguments as to what rolls do what (ie. we're a bunch of dopes and can't get the basics straight):

Taking 10: Only available outside of encounters or threatening situations. This really shouldn't come up often but is available (PHB 179) and only applies to skill checks. You can't take 10 on a strength check or attack roll.

Automatic Hit/Miss: On an attack roll, a "1" misses. A "20" hits and could be a critical if your total attack roll would hit the required defense (PHB 276, 278). A "1" on a skill check is just a crap roll. A "20" is just a good roll.

You choose the order you make saving throws at the end of your turn. A number lower than 10 (ie. 1-9) is a fail. Higher than 9 (ie. 10-20) is success (PHB 279).