Hold [Ctrl] + [Alt] + [V] while the pointer is completely to the left of the screen and press the Left Mouse Button. This will refill your health bar.
Unlimited pendants and flasks
When you pick up the flask and the pendant in a house, click where the pendant and flask used to be. You can keep getting both of them repeatedly. Try getting as many flasks as you can carry. The extras can be sold for 15,000 each. Note: This only works the first time when you get the items; you cannot go back in and get more.