What, how to stack sats? That just means acquiring bitcoin regularly regardless of the exchange rate/price.
You can ask people to whom you sell goods or services to pay you in bitcoin, or you can just buy it directly. Either in a p2p marketplace like robosats or a centralized exchange. Mining is even cooler but pretty advanced and there’s overhead costs.
The most important thing is to keep them in self custody and not leave on an exchange so you know they’re real. Ideally validate yourself too, using your own Bitcoin node