I'm really excited about this one. There are two processes when it comes to smoking food: 'cold smoking', where things like raw fish, meats and cheeses are put into a smoky environment with no heat source, and 'hot smoking', which has the added heat source. It gives great results.
All you really need is an old biscuit tin with a lid, a wire rack that fits inside it or a bit of chicken wire and some uncoated sawdust (the type you get for putting in pets' cages). When you put the tin on your heat source, it will act like a kind of oven – don't get nervous if it seems a bit radical to you, because it's so easy. And imagine how impressed your mates will be when you tell them you've hot smoked the food yourself!