REST
These commands change your position. When you REST, you regenerate hit points, mana points, and movement points more quickly. However, you are more vulnerable to attack, and if you SLEEP, you won't hear many things happen.
You will regenerate at the same speed whether you are resting or sleeping. Sitting or standing will regenerate slower than resting or sleeping.
Use STAND or WAKE to return to a standing position. You can also WAKE other Sleeping characters. WAKE can also be used to break some trance-like states.
You may also use these commands to rest/sit/sleep on/in/under/in front of/behind furniture items. When in Agrabah, try sitting in the pool of water by the marble elephant fountain. Just type SIT POOL. Many items in the game will be furniture that can actually be used. Chair-like items and pillows will be the most obvious ones. You may need to know how to do this to complete some quests or with certain skills.