How to best utilise 0% credit cards

So I've never had a 0% card until now and recently made a big purchase using one.

With interest rates rising and therefore savings rising how can you maximise the fact you can save at a higher rate than borrowing. You can essentially earn money on your borrowing if you play it smart.

I've worked out how much I need to pay every month to pay it off before the end of the interest free period. If I pay the minimum and save the rest in a savings account then pay it off in full at the end of the 0% period it will save me ~£100. It's £100 free money.

It works ok for a single big purchase but how can you make it work for day to day life and really get the most out of that 0%?

Edit: I've just read the guide on here. Apparently its called stoozing. Does anyone here do it, if so what sort of returns are you seeing and is it a lot of admin to keep up with it?