Well, gee, I'd have to say, TEST'EM AGAIN!
Does it start when jumped with a good battery?
Because something is bad-or at least intermittently bad.
Many national auto parts stores'll check your charging/ignition system out for free.
Check the starter relay for proper operation.
The clicking is usually low voltage to the starter solenoid-maybe your battery's being drained by a shorted electrical component.
Good Luck!