Replying to Pencilly/too fast spins

i have a problem with spinning this year
so far everytime ive spun its been either pencilly or shitty form
and i am finishing my spins way too early
like ill do the 3 and then just stop
which leaves me a bit more air so i end up eating shit
its kinda hard to really explain if i could figure out how to put video on my computer i could show a clip of when i 3'ed this cliff
basically i hucked a 3 then stopped spinning and dropped another 10 feet
any ideas how to get it less pencilly/ not as fast