Using a length of rope securing you to a friend is recommended, as is using crampons and carrying an ice pick. The air is thin up here, you may find yourself having to breathe a lot to get the required amount of oxygen. If you're still going, you get a breathtaking reward for your sweat and the hazards when you set foot on the summit of Mont Blanc. The occasion calls for some celebration, like for instance a glass of Koskenkorva Vargtass . But again, don't have too much.
Most people are tired and have sore feet on the way down.
Don't trip and fall going down the Aiguille du Gouter. If you're lucky once more, you catch the last train and cable car back, so you don't have to walk all the way down to Les Houches at 1008 m. This village, although quite small, has an amazing number of good restaurants, and you may find that you have earned your champagne and five-course dinner.