to be honest I think that method will take way too long to work as you are rewarding the dog sitting rather than walking nicely. I have a siberian husky, the most notorious lead pullers in dog history and I only used half the method mentioned above.
my dog stepped out in front of me and I simply turned 180 degrees and walked the other way. every single time she stepped out in front I turned and walked the other way.
because your dog is older I would be adding in a verbal correction as well just to let the dog know that pulling is no longer wanted. i.e I usually just say "no" and turn and walk away. I start off quite mild as if to say, "ahh not quite try again" but depending on the determination of the puller I up the verbal correction.
Pulling is a behaviour problem. They pull to get places they want to go and they are usually focussed on that. The verbal correction I usually use is simply to get their focus off whatever they are looking at and then the turn around is you will NEVER get to where you want to go until you walk nicely.
Don't be disheartened is took me 1 week to leave my driveway but only 6 months to get her reliably walking loosely on lead by my side.
"In order to really enjoy a dog, one doesn't merely try to train him to be semihuman. The point of it is to open oneself to the possibility of becoming partly a dog." - Edward Hoagland