Action Points are no longer used for PCs.
But you can always have a 1 RP after an extended rest if you are at 0.

How RPs can be gained:
Role-playing: By playing beliefs and instincts, roleplaying your character well.
Maximum RP: you can have is one-half your level.

How RPs can be used:

• Advantage Roll: You can spend a RP point to gain advantage on your next roll. Or grant this bonus to another character, as long as you are in the same location and your character can reasonably affect the outcome of the roll (such as distracting a monster, shouting words of encouragement, or otherwise aiding another with the check).
• Act Out of Turn: You can spend a RP point to take your turn immediately. Treat this as a readied action, moving your initiative to just before the currently acting creature. You may only take a move or a standard action on this turn.
• Extra Action: You can spend a RP point on your turn to gain an additional standard or move action this turn.
• Inspiration: If you feel stuck at one point in the adventure, you can spend a RP point and petition the GM for a hint about what to do next. If the GM feels that there is no information to be gained, the hero point is not spent.
• Recall: You can spend a RP point to recall a daily power you have already used.
• Cheat Death: A character can spend 2 RP points to cheat death. How this plays out is up to the GM, but generally the character is left alive, with negative hit points but stable. The character can spend a RP point in this way to prevent the death of a familiar, animal companion, or mount, but not another character or NPC.