As you'll want to continue minimizing the amount of smoke your cigarette produces, the best way to put it out is through water. Hold the cigarette in your hand and gently douse it underneath a faucet. Make sure to keep the cigarette in your hand; if much of the ash falls down the drain, it could lead to clogging. The definition of an 'ashtray' will depend on where you were discarding the ash while smoking. Often, a small plate or cup will work as well as a real ashtray. Scrub with water and a bit of soap until the ash is gone. If you were smoking out a window, it's likely you were dropping the ash out the window. This is a good idea in most cases, so long as you make sure not to let the ash hit the side of the building. If you do, the black trail from your window leading will be a telling sign you've been smoking, and the evidence is very difficult to clean up discreetly. The best way to get rid of a cigarette discreetly is to flush it down the toilet. Before you flush it, make sure you've covered the cigarette in some toilet paper; that way, there's less chance of parts of the cigarette floating back up. If you're really cautious and are worried you'll be caught whilst disposing, you might prefer to seal the cigarette remains in a Ziploc bag. That way, the next time you go out, you can throw it out in a public trashcan. Even when the cigarette is gone, you'll still have some things to do to make sure you won't get found out. Washing your hands thoroughly is a good start. Make sure to use a lot of soap. Washing with hot water alone won't be enough to rub off the smell. Just like your hands, your teeth will keep a lingering odour after you've smoked. You should make sure to brush your teeth for at least two minutes, with special attention given to the tongue and gums. If your breath is still bad, eating a spearmint candy or gum will fix any lingering smell issues. Showering is the most important part of post-smoke hygiene as smoke will linger on any surface it touches. Use a lot of shampoo and wash your body...

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Write a summary of the previous text in Vietnamese:
Giội nước lạnh vào mẩu thuốc lá. Dọn sạch vật mà bạn tạm thời dùng làm gạt tàn. Vứt thuốc lá đi. Rửa tay. Đánh răng. Đi tắm. Mặc một bộ quần áo mới. Luôn bình tĩnh.