well for example ive found a company who print abroad and i resell there product, so i can get 10000 a5 double sided flyers printed for 25 quid but i sell them for 80 quid (over 300percent mark up straight away) now if they need it designing aswell i can do the print and design for 230 ish and the design takes me 2 hours so its 2 hours work for 230 quid, and if they just want the print they email me the artwork i email it to the printers, it gets printed and they recieve it 3 days after the day they ordered it, other things like events managements, u rent a bar out for the night and hold ur own event there, charge a couple of quid on the door, if u advertise it well and u get 250 people at 2 quid a pop u can make 500 quid, and to keep the bar happy u say to them u keep all the money made on the bar, so they get alot of money and so do u, there are loads of ways to do it, another one that ive done it buy a nice dslr camera for about 450 and advertise urself as events photographer, u can charge 350 a day if u want, u do it twice that means uve made money and paid for the camera