Vigilant vigilancy!
No wait, I know a better one:
Constant constancy!
Anyhow, it does suck a bit to be reading excessively to an exam I am pretty sure I'm going to fail...
Oh well*, it
most likely/usually doesn't hurt to try...
Maybe, probably.
*) (Edit: How can I misspell "oh well" as "oh wail"?
)