Apart from the fact that we should take nothing for granted, and that down ballot races are crucial as well, here is another thing to motivate us all even if we live in states like California and New York:
The record for most votes any presidential candidate has received belongs to Ronald Reagan in 1984 - 54,455,075.
(Al Gore of course comes in 2nd; it still grates to say that).
The projection of turnout this time is between 110 and 118 million votes.
It would be gravy if on the morning on 11/3, we awaken to find that John Kerry is not only president-elect, but also has broken Reagan's record.