There are five precepts for every Buddhist:

1. No Killing (不杀生)

What is killing? End the life of a creature.

• Kill a person is KILLING.
• Kill an animal is KILLING.

2. No Stealing (不偷盗)

何谓偷盗？ 不予而取。

What is stealing? Take without permission.

• Take money is stealing.
• Illegal downloads or using of pirated software is also STEALING.

3. No Sexual Misconduct (不邪淫)

What is Sexual Misconduct?

Have a sex relationship with a person other than wife or husband.

4. No False Speech (不妄语)

What is False Speech?

• Tell a lie.
• Cheat somebody.
• Play a joke on somebody.

5. No Alcohol (不饮酒)

What is Alcohol?

• White wine is alcohol.
• Red wine is alcohol.
• Beer is also alcohol.
• Cocktail? Alcohol too.

For more information: http://en.wikipedia.org/wiki/Five_Precepts