All good advice. Personally, I have the Park chain gang, I think it is called. I use a solutin called Orange Awesome Degresear I get at the Dollar Store. I clean the drive train, not just the chain, once every two weeks at a minimum. I also use a spray bottle of Awesome and an old toothbrush to clean the chain rings and cogs, plus old socks for cleaning between the cogs.

Your chain will tell you when it needs cleaning as it gets noisy. Nothing is more satisfying than flying down the rode at 25mph+ and nary a sound coming from your machine other than the sound of the tires on the road.