As Dr. Jack Taylor mentioned in his class, "Get the tune in your head." Hearing a tune played and sung is one way. This video demonstrates both!
When you are learning a new jig, do you often have trouble staying “on the beat” because you are using all of your concentration just to play all of the melody notes, gracenotes and embellishments correctly? Then, after you get those pesky things out of the way, are you still having trouble getting that “jig feel”? Using a metronome during your practice may well be a useful tool for you.