In addition to this, it's also good to understand that letting the chain and lube sit for several hours before use will allow it to creep into important spots and the carrier solvent to evaporate off, leaving thicker lube where you need and want it most.
+1. I lube the chain in the evening and let it dry overnight for this purpose. Once a week lubrication does my bike just fine, and I seem to hit around 2,000 miles on a chain. Good enough for me.