Stamina gain in chests. +X stamina gain for x amount of hours.
Perhaps we can see something like +1 - +2 stamina gain for 6 hours from the chest. We can play around with the numbers and how it is delivered (potion, unleechable buff, etc.).
Another idea: 1 free DQ reroll for that day
Would love to see multiple ideas being incorporated like what doom and shindrak have said above