Ability Contests: Depending on the stakes of a protracted contest, opponents may need to roll more than once. Typically, it will be the first person to reach three (3) successes wins.
Ex. Gambling, Persausion, Interrogation
You can expend one hit die to recover one level of exhaustion with a short rest.
Exception to the helping rule. When a party is trying to be stealthy, the person with the lowest stealth modifier rolls.
If not prepared to hold breath (usually a Dex DC10 save to inhale quickly), creatures have 1 rd. per Con bonus before drowning. Minimum 1rd/