(the following is from: http://www2.hawkesbury.uws.edu.au/BuddhaNet/2-gqga.htm)
What is the First Noble Truth?
The First Noble Truth is that life is suffering. To live, you must suffer. It is impossible to live without experiencing some kind of suffering. We have to endure physical suffering like sickness, injury, tiredness, old age and eventually death and we have to endure psychological suffering like loneliness, frustrations, fear, embarrassment, disappointment, anger, etc.
 

What is the Second Noble Truth?
The Second Noble Truth is that all suffering is caused by craving. When we look at psychological suffering, it is easy to see how it is caused by craving. When we want something but are unable to get it, we feel frustrated.When we expect someone to live up to our expectation and they do not, we feel let down and disappointed. When we want others to like us and they don't, we feel hurt. Even when we want something and are able to get it, this does not often lead to happiness either because it is not long before we feel bored with that thing, lose interest in it and commence to want something else.

Put simply, the Second Noble Truth says that getting what you want does not guarantee happiness. Rather than constantly struggling to get what you want, try to modify your wanting. Wanting deprives us of contentment and happiness.
 

What is the Third Noble Truth?
The Third Noble Truth is that suffering can be overcome and happiness attained. This is perhaps the most important of the Four Noble Truths because in it the Buddha reassures us that true happiness and contentment are possible. When we give up useless craving and learn to live each day at a time, enjoying without restlessly wanting the experiences that life offers us, patiently enduring the problems that life involves, without fear, hatred and anger, then we become happy and free. Then, and then only, do we begin to live fully. Because we are not longer obsessed with satisfying our own selfish wants, we find that we have so much time to help others fulfil their needs. This state is called Nirvana. We are free from psychological suffering.
 

What is the Fourth Noble Truth?
The Fourth Noble Truth is the Path leading to the overcoming of suffering. This path is called the Noble Eightfold Path and consists of Perfect Understanding, Perfect Thought, Perfect Speech, Perfect Action, Perfect Livelihood, Perfect Effort, Perfect Mindfulness, and Perfect Concentration. Buddhist practice consist of practising these eight things until they become more complete. You will notice that the steps on the Noble Eightfold Path cover every aspect of life: the intellectual, the ethical and economic and the psychological and therefore contains everything a person needs to lead a good life and to develop spiritually.
 

(the following is from: http://home.sol.no/~kmeyer/budd1.htm (Michael Holmboe Meyer))
The Noble Eightfold Path is:

1. Right Knowledge, which means an intellectual grasp of the Teaching of Dharma, the Four Noble Truths and the Law of Karma -

2. Right Intention, which involves the elimination of all ambitions, revenge, hatred, greed lust and violence -

3. Right Speech, which means stamping out all lies, controlling speech, being courteous, considerate, scrupulously true, no evil words escape from lips, compassionate and full of sympathy, with a heart full of loving-kindness and free from secret malice -

4. Right Action, which means the avoidance of destruction of any living being, of taking what has not been given, indulging in sensuality, slander and intoxicating liquor or drugs -

5. Right Livelihood, which means pursuing a trade or occupation compatible with the above -

6. Right Effort, means to prevent new evil entering one's mind, to remove all evil already there, to develop such good in one's mind and to maintain a good and meritorious state of mind that has already arisen -

7. Right Attentiveness, which means the continual recollection of all phenomena about bodily structure, all parts of the human body, all states of health, all impurity and purity of mind, contemplation of various states of mind and all kinds of temperaments -

8. Right Concentration , which is the threshold of Nirvana, consist of the Four Great Efforts, namely, the effort to avoid and to overcome evil states of mind, and the effort to develop and to maintain good states of mind. It also composes a state of mind which is accompanied by Right Knowledge, Right Intention, Right Speech, Right Action, Right Livelihood, Right Effort and Right Attentiveness. The purpose of attaining Right Concentration is to develop the eye of wisdom.