Struggling with Leash Reactivity – How Did You Fix It?

My dog, Charlie, is great at home but turns into a completely different dog on walks. He lunges at other dogs, barks like crazy, and I can feel the tension in his leash. I know it’s anxiety-based, but I don’t know how to help him stay calm.

I just watched this heel training video that talks about stopping leash pulling and lunging by using structured leash training, the right tools, and high-value rewards. It looks promising, but I’m wondering if anyone here has tried these techniques for reactivity.

Here’s the video I found.

For those who’ve successfully worked through reactivity, what helped the most? Was it leash training, counter-conditioning, or something else?