Basics
Pull the battery terminals and clean them.
put a meter on the battery and measure its voltage.  Batteries have been
known to fail five minutes after leaving the store.  Measure the voltage
with a load on like the head lights turned on.  Bus bars have been known to
crack in batteries, read good with no load and as soon as one hits, nada.
If it has two cables on the pos terminal, pull the bolt out and the spacer
between the cables and make sure everything is clean.

Whitelightning

Try this. You'll need an assistant. Open the hood. Locate the positive
battery terminal. Have the assistant turn the key to start. Instruct the
assistant to release the key if ANYTHING happens at anytime during this
exercise. While the assistant is holding the key to start. Reach to the
positive terminal, (MAKE SURE THAT YOUR HANDS AND ANYTHING ELSE THAT YOU
VALUE ARE OUT OF THE WAY OF ANYTHING THAT MIGHT MOVE) and wiggle the
wires attached to it. It might start, it might just click, or it might
turn over without starting. Any of the three indicate that your positive
battery terminals on the cable are corroded. If it is, you can replace
the cable or you can clean the cable. Cleaning it is not simple. You
must cut away the boot that insulates the two cables that are there. You
then seperate the terminal stack, that being the thru bolt the starter
cable terminal, the lead washer, then the body cable terminal. You may
notice some green, and/or white gunky powder. If the green gunk goes
down into the twisted part of the cable, just replace it, cuz it will be
corrided again in short order. Green is copper corrosion, white is lead
corrosion. The cause of this is battery acid leaking on this terminal
stack, which is composed of a cadmium plated bolt, a tin plated copper
terminal, then a lead washer followed by another tin plated copper
terminal. This combined with current flow, is a prime recipe for
corrosion. If you have to replace the cable, consider changing to a top
post battery and eliminate the problem.

If this doesn't help, sorry, I got nothin'.

KenG

Had the same thing happen to my 01 after going to the grocery store,
nothing,nada,no crank,nuttin. Popped the hood wiggled  the positive cable
and the whole cable lug came out of the battery and then all the electrolyte
started pouring out.  This happened about a year and a half old, I had to
walk across the street to Walmart and buy a battery to get home. Then clean
up up all the electrolyte spillage. Not quite professional grade in my
opinion....