Naturally Cooling Your Wort
When it comes to brewing, besides perfect sanitisation the other deciding factor is temperature. If your equipment is sanitised correctly, from the pot you boil in to the spoon you stir the mixture with the only thing you have to contend with is the temperature of your wort (especially during the initial fermentation stage). Depending on the style of beer you are making, your temperature will vary. One of the biggest problems I have as a homebrewer is cooling down the hot wort mixture before pitching my yeast.