The most important thing to support is the ability to listen. This is the first thing you should do. Prepare for the long outpouring of the other, do not interrupt and do not give advice – yet. Instead, substitute your shoulder, prepare a soothing tea, hug a dear person and listen.
After this important step is completed, all the tears poured, all the words spoken, it's time for your advice. Help your friend to deal with the situation, causing him to action. If a person, being upset, can not objectively assess the situation, and seen it in extremely limited quantities, help him to look at the problem from a new angle. Now you are the carrier of objectivity and sobriety, and this is a very important post, because what you would advise a friend, can be implemented.
Help your friend to escape. Most importantly - do not rush into the maelstrom of solving the problem, it is important to come to, to relax and unwind. And who, if not friends, best friends in this? Take the tortured suffering of a comrade on a positive event, arrange a theme party or Biking outside the city. All it will dispel the negative mood of your friend and give him hope for a positive resolution.
Let them know that whining is not the answer. There are times when, despite all the efforts and change of mood, after a time it goes back to the tears and complaints. You can not give up, but it is important to clarify to the person that the endless whining, the problem is not resolved, you need to be strong and to end it once and for all. This will contribute to your positive and proactive attitude.
Help to change the other. The one that got a sad lesson in life must add to his experience and therefore subject to change. If it is difficult to do it internally, start with appearance: new hairstyle, new style of clothing, a new interest. And internal compliance will not be forthcoming. Your friend will change for the better, will be more interesting, wiser and more experienced, and your relationship will gain amazing strength and confidence.