Sometimes you'll be called upon to randomly select something – often a model, but sometimes a magic item, a spell or similar. Where this is the case, simply assign a D6 result to each of the things the random selection must be made from, and roll the dice to make your random choice. If you have fewer than six items to randomise between, simply re-roll any unassigned results until you roll an assigned number.
For example, a player has to randomly select one of five models. He assigns each model a number between 1 and 5, and rolls a D6, re-rolling results of 6 until he gets a number between 1 and 5.”