spin more with your shoulders and torso than your arms. alot of people when they start spins go for the big arm wind-up. keep your arms below your shoulders and you will always spin quicker.
also if your having trouble getting 3's try spinning the other side... same thing happened to me, i always attempted them spinning to my left never got them. tried one to my right got it first time easy
also spotting your landing will get you there, if your head and shoulders are facing the landing your legs will come round
hope this helps