The cooking time of rice varies according to the specific shape and variety, the age of the grain, the degree of processing, and the type of dish in which it is being used. The best advice is to follow recipe instructions, or the method on the packet - in which case test whether the rice is done a few minutes before the time specified, as its cooking time will often be overestimated. If cooked properly, long-grain rices will stay separate and fluffy, as in a good pilau. Because wholegrain rices retain their outer layer, they take anything from 10-30 minutes longer to cook than white rices, and the grains remain separate when boiled. On its own, 'wild rice' takes 45 to 50 minutes to cook; when cooking a ready-made blend you should follow the packet instructions as the wild rice will have been specially selected or treated to ensure it is done at the same time as the other grains in the packet.
If you're cooking rice in advance, cool it down as quickly as possible using cold running water; store in the fridge for no more than one day. Cold, cooked rice can be thrown into salads or soups, or used to stuff vegetables such as peppers and aubergines. Pre-cooked risotto can be made into fritters or the classic Sicilian dish arancini (stuffed and deep-fried rice balls).