I agree w/Robyn. Puppy School is good a way to learn commands and also socialize with other puppies.

Gigi doesn't have a reliable "come" as well. Well... she is not reliable in a loooooooooot of her commands. Patience and loooooooooots of practice. I am still working on those. I have my good days and bad days.

Oh, 1 way to train "come". Show Gracie a treat in your hand and throw it, she will go get it. The second she got the treat say "come", then she will come for another treat... when she came to you, throw the treat again... repeat. Or another way to train "come" is have 2 people sit opposite to each other... have Gracie on one side and the opposite person will show Gracie treat and tell her "come", so she will run to that side. And the other person will say "come", so she will run back.

Have you consider clicker training? it's good stuff.