Think fun, what is fun for your dog?
The idea is to make them want to be with/near you.
I used Absolute Dogs/Sexier than a Squirrel podcast.
They have a variety of video/downloads to manage certain things.
The basic premise is playing games to get/reinforce the behaviour you want.
It works for me, Alfie (6mo WCS) sticks fairly close, he will wander off but checks in frequently and comes back like a rocket when called.
I’ll play a quick game, praise, make a fuss or give a treat - which keeps it interesting for him.
I’m working on the whistle recall - using the method on here.