I can't stress enough, Practice, Practice, Practice!!!
Short of that you need something that can seek out the peaks in your file, split the file at that peaks and then quantize. Logic can do it (via Groove Quantize function), but Logic is Mac only now, and according to my Sweetwater rep, Emagic went as far as to buy back as many unsold PC copies as they could in order to secure more Mac sales (Retarded if you ask me...). Not using this practice myself, I don't know of any other software that'll do what your looking for, automatically.