Keeping a stallion ? HELP ?

I have just bought a 6month old colt, and am planning on opening up a stud and using my colt which i just bought as a stallion. I was just wondering if i could get any tips and advise on owning a stallion at stud? I have 4 other horses, and had foals in the past out two of my mares. They are all kwpns, so i understand how difficult they can be. Any advice, tips etc would be a great help ! Thanks (: x