Regaining Hit Points
In-combat, you can regain hit points from a magical healing spell or a healing potion.
Out-of-combat, you can regain hit points from resting. You must eat some food/water and sleep for at least 6 hours to rest. A rest allows you to regain 50% of your hit point total.
Ability Usage
As soon as combat ends, your Tier Abilities all "recharge" and you can immediately use them for the next combat encounter. Read more about Tier Abilities on the Character Abilities page.