Watching my life flash before my eyes.
Seeing how high I can count, "One, Two, th"
Considering all the Britney Spears songs I like.
Computing the answer to the universe on my new 3GHz dual-core system.
Watching the clock.
Catching up on my beauty sleep.
Stopping to smell the roses.
Trying to get the jump on everyone else at quick-posting an answer to PerlMonks.
Results (293 votes), past polls
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
Results (45 votes),