I agree with what's written above and offer these bits of advice, for what they're worth:
1. If I ride in the rain, I try to dry the chain with an air compressor shortly after riding.
2. If you don't have a compressor, WD40 is the next best thing (to disperse water only). Whichever you do, the goal is to get the water out of the chain to prevent rust (and accelerated wear).
3. Following step #1 or #2, wipe off the chain and use whatever chain lube you prefer. I use Maxima Chain Wax, for motocross bikes, and feel that it is the best product out there. It is wax-based, not petroleum based, and due to how it dries, it does not seem to "gum up" and hold dirt as badly as others (or leave a tattoo on your calf). Chain Wax is the only motorcycle product I'd use over a product marketed for bicycles, by the way.
4. I have seen motorcycle racers oil a chain after riding for 5 minutes to warm it up. The theory is that the metal gets warm and expands, allowing the lube to better reach the pins and rollers. Does it really help? Who knows, but I thought I'd mention it. Good luck.