There are so many things Vaseline can help with (keep it with you at all times):
Chafing: If you feel any chafing, put Vaseline on it to stop the irritation and to protect your skin.
Anti-chafing: where this is risk of chafing, rub Vaseline on to prevent the chafing occurring at all.
Cuts and scrapes: smooth some Vaseline over them to protect them from getting infected.
Relieves dryness: great lip balm
Note: Even though it is called a jelly, do not eat it!