Using a bench dog Crown Molding cutting jig, I use it to stand up the crown molding at the correct 52 degree angle, and cut the crown with the miter saw set at 45 degrees.  I used a Makita 1216L 12" miter saw to make the cut.

I used a EasyCoper coping jig paired with a Jigsaw.  First, darken the profile, cause when the dust gets flying, you'll lose the line.   

Take a jigsaw and cut about 1/16 shy of the line

 More progress..., and file down to line.  This part is like Kung Fu, you have to use your best judgement over many many tries... you'll eventually feel the Zen of this process.  It will become faster and cleaner as you do more of it.  Especially with hardwoods, which is the hardest to do.  Also, make sure your files are some high quality ones that's never touched metal before.  Else you'll be pushing and pulling much more than you want.

 Not too bad, could use some work... Back to the sawhorse.  A couple more tries... you'll get it.  Don't be ashamed of going back and forth a little extra.  There's nothing shameful about practice making perfect.