Start with choosing a wallet that is known to be secure, such as a hardware wallet. They are less convenient but they are known to have higher security against hacking or theft. Some tips on keeping your crypto safe:
-Create backups of your wallet
-Don't keep too much currency on an exchange
-Use 2FA whenever possible
-Update your wallet software continuously
We go into more detail on all of this in our blog post so check it out
Bit.ly/WalletGuide
Cheers!