A fatal mistake a lot of people make when first learning to smoke is the type of smoke they have passing over their food. Firstly you need a good quality smoking timber that's well seasoned. Unsuitable timber like pine kindling for example gives off an extremely bitter billowing type smoke that not only tastes gross but also covers your food in a black soot. That black soot can also happen even with quality smoking timber if you're not careful with your fire management. You're looking for a clean burn without any white smouldering smoke. Look at the smoke coming out of your chimney and it should be a thin stream of light blue, almost invisible smoke. If it looks like the following video you can be happy your food is getting flavoured with the best possible smoke.. If you see big plumes of white smoke billowing from your chimney, open your door and vents and breathe some oxygen into your fire.