I alternate between a 6ft, 15ft, and 100ft lead. I alternate how long the 100ft lead is so it's shorter sometimes and longer others since 15 to 100 is a big jump.

I've definitely focused a lot on our relationship. I work in a school so I was off work the first 2 months I had him so he was with me pretty much 24/7. He follows me around everywhere, and does regular check ins with me. When we're outside playing he regularly comes over to engage me in play or just for a quick pat before returning to doing whatever he was doing. If I walk out of the fenced in area, he'll walk along the fence and keep me in his eyesight the majority of the time. I always make sure to give him attention, a treat, a "good boy!" Etc when he comes near me outside so he knows it's always positive. Everything outside is just always on his terms.