Ugh.

Someone really ought to teach me how to sleep the night before an exam. It's 7:09 AM, and I don't think I've done more than doze off a few times. Sleeeeeeepy!

I suppose I can always hope for state congruent memories to kick in though, at least for grammar. Did you know that if you learned something in a certain state, you're more likely to remember it again if you find yourself in the same state? I.e. if you learned something while you were under the influence of for example amphetamines, you'll have better recall for the material you learned if you do amphetamines again. I'm not entirely sure that it works for sleeping, since you know... lack of sleep generally reduces your ability to do most things, but... Here's to hopin'!

Also, did you know that 'ought to' is a modal auxiliary? This means that it has meaning (or modality!) on its own, and it use is colored by this meaning. 'Ought to' is similar to 'should' and signals strong probability or obligation, though it is more objective than what 'should is'.