From New York or northern New Jersey:
Take NJ Turnpike south to exit 9, New Brunswick. Go in the direction of Trenton. The exit will put you on Route 18. Stay on Route 18 for only about 1/2 mile, then exit a quick right onto Route 1 South. Take this about 15 miles. Go past the Princeton Market Fair, and go under the Meadow Road overpass. Make an immediate right to exit onto Farber Road. There is a Mobil gas station on one corner and a car wash on the other. Princeton Academy of Martial Arts is the first building on your left.

From Pennsylvania:
Take I-95 North into New Jersey (you'll cross into New Jersey at the Yardley exit). Follow it for about 10 miles to Route 1 north. Follow Route 1 north approximately 2 miles. Take the Meadow Road Exit, staying to the right. Go over Route 1 and exit onto Southbound Route 1. Go under the overpass, and make an immediate right onto Farber Road. There is a Mobil gas station on one corner and a car wash on the other. Princeton Academy of Martial Arts is the first building on your left.