Pulling on leash

Question
Hi i have a 4 yr old lab/corgi mix. She sits when i tell her to sit and she stays when i tell her to stay and i give her alot of praise and i reward her for listening. When i get ready to put her leash on her she sits and she gets praised and rewarding.Its when we get ready to go she wants to pull. I have been working with her to make her not pull.SHe doesnt do it has much as she did But at times she takes this spell that she wants to pull me and not listen to me.How do I get My dog Not to pull on the leash when we are walking?

Answer
What usually works pretty well is something called a prong collar,although it can look harsh it isn't,it actually reminds dogs of there mother's scruffing them as puppies

and what you do is when they pull is you 'pop' the leash back and walk the other way for about a minute