Well, first when I started remembering my dreams I could only remember (approx.) one dream a week.. Over time it got to one dream every 4 days. I start slapping my arm every time I dont remember a dream, very quickly it's around 1 dream per night, there are days when i still don't remember any at all. But mostly one dream per night. The length of the dream recalls varies..
Now I'm aiming at remembering more than one a night.
I will come here to "report" how well I've succeeded...