Hunger and thirst? Not sure whether anyone has said anything about this, but if you're hungry or thirsy your stamina could decrease faster, or stats could decrease when it reaches rael low, if it's put in say....
Trees? You could pick fruit off of trees, or bang a tree with your weapon, or give it your shoulder, fruit or even little sticky insects could come out, hell you could disturb a bees nest or find a useful item!
Trainer NPCs? Similar to where you can get a skill from the leader of the warrior guild in DD, you can study under an NPC, except they could provide you with a stat increase perhaps, or give you access to a hidden area....
