I never reheat rice. The apprent risk of food poisoning just doesn't seem worth it compared the ease of cooking up a new batch.
The ready meals you buy in the supermarket use rice that has been through a complete sterilisation system in the factory, just before packing. I saw it on "How do they do that?" on the discovery channel - I can assure you, they appear to take the risks involved very seriously indeed.
If making a rice salad, I always cook it, then cool it with cold water and a sieve. It always gets thrown away, never re cooled.