Before leaving for the Tower be sure to tell your mother you're leaving. In return for your courtesy she'll provide you with a much-needed Pita Fruit.
Monster Hunting Tips
Need to get rid of a pesky monster before it attacks? Throw one of your items at him. Magic items will generate whatever effect the would on you, leading to some interesting possibilities. For example, if you thrown an Olean (the blue fruit) at a monster it will vanish instantly.
Refill life
Get to a corner and repeatedly press Triangle and Circle.