For me, I use rec ball as a chance to give kids reps. Winning comes because they're doing things right, not because that's what I'm focusing on.
One thing that worked for me in soccer this past season was grouping kids and playing them at the same position the whole game. So I did 3 back, 3 mid, 2 forward, if I had the whole team I had enough kids to sub out one on the back, one mid, and one forward. In previous years, I just kind of threw subs out piecemeal in a "who needs a break/hasn't come out?" approach. There will be plenty of kids who don't like playing back or whatever, but if they're just doing it for a game or a half, they buy into it more, and it will help the kids who keep playing when someone is blocking them from playing their "preferred" position on a travel team or school team, that they understand a bit about how to play somewhere else on the field.