We raised 7 and they turned out to be productive members of society who still speak to us.
We used 1-2-3 magic method. It works well up to a point.
And it only takes a few “3’s for them to get the message. The difference for me was that upon reaching “3” they got a 3 shot spanking not a 5 minute time out. The “time out” deal expired pretty early on and “corporal” made sure they understood the rules.
My hard and fast rule is: no more than three shots to the backside. There were pants up spankings, and pants down spankings, and they know the difference.
Also, I would count at varying speeds to inject a level of uncertainty to assure immediate compliance with the first directive.
My kids are 8 and 6 and I haven’t had to spank them but a few times in their lives. Once to the understood what it meant to get to “3” and, once pants down as what I called “capital” offenses.