Been wondering about this. I'm pretty new at lucid dreaming, using dream journals, induction techniques, etc (although I've had lucid dreams before), and most if not all the websites describing this mention that during a night, people can have multiple dreams in one night (granted they sleep long enough I'm assuming).

I'm asking because people say that if you can remember every dream you had in a night, your chances of lucid dreaming is greatly increased, but I'm having trouble with what exactly that means. Last night I remembered about 2-3 of them, but my sleep was sporadic, and I'm having trouble figuring out if that means I'm doing good or not. Generally, when I wake up from a dream I can recall the immediate events of that dream, and as I go back, things get fuzzier, but I usually only remember one dream, or so it seems.

So here are my real questions:
What separates one dream from another in a single night?
When people say that I should be working towards remembering multiple dreams per night, do they mean I should be able to remember all of these dreams in a string, or do they mean I should be able to wake up in the middle of the night and remember the dream I just had?