If you are bending/flaring your own. Instead of renting the crappy flaring tool at Autozone that may or may not give you good flares. Spend the money and get one of these, I've never had a flare that was anything less than perfect with it. There is currently a $10 off deal if you subscribe to their emails too.
Eastwood On Car Brake Line Flaring Tool for 3/16 Tubing