1) Whether that kid you beaned with a kickball in second grade is doing all right now.
2) That chocolate on pasta would be a brilliant money-making scheme and the only reason it doesn't exist yet is that no one's thought of it before you.
3) That you've fallen way behind in biology class, and will have to cram hard, until you realize you were just dreaming and it's been fifteen years since you took a biology class.
4) That oh my god you just dreamt up the perfect way to solve that big problem at work and now just find a pen before you forget it oh crap it's gone.
5) That apparently it's easier to fall asleep upright at your desk under flourescent lights at 3PM than it is in your bed in the dark at 3 AM.