You need somebody who is able to buy you cigs, also knowing a lot of people who smoke is useful. First off you get your hands on 20 cigs, that's £5.00 or so. Secondly take these to school and start to sell them for £0.50-1.00 each. Thridly, you'll of made 2x your money, if not 4x your money, buy another packet, rinse and repeat! If you go away with your parents, who don't smoke, ask them to buy as many cigs as possible, in packs of 200, if you go to spain in some parts, you can get 20 for £1.00, then sell the packet for £3.50 and make £2.50, or you could sell them like above, you'd make £9-19 profit/pack.