Solana is a proof-of-stake network, and delegating your SOL to a validator earns you staking rewards with no hardware required.
Use a reputable Solana wallet such as Phantom or a hardware wallet with Solana support.
In the wallet's staking section, choose a validator. Look for good uptime, reasonable commission and a solid track record.
Enter the amount you want to stake and confirm. Your SOL stays in your wallet but is delegated to the validator.
Rewards accrue automatically. You can view them in your wallet and add to or withdraw your stake when you choose.
Unstaking takes a few days to complete, and there is always some risk if a validator misbehaves, so choose carefully.