Can Sleep? Cannot Sleep?

Sometimes, people just can't get to sleep no matter how hard they've tried.

For me,
Some reasons for not being able to sleep:

`Exciting events coming up the next day (Someone's birthday bash etc.)
`Exams on the next day (most probably not this reason)
BUT...
`Last exam paper on the next day!(calls for celebration)
`Thinking about something
`Thinking about someone
`Thinking about what to do tomorrow
`Simply just can't get to sleep
`Maybe it's time to change a new pillow

That's for me.
How about you?(: