Oh yes. So many. Where to begin? It's not too hard to get started with a password manager. I like 1Password personally, but any password manager is better than no password manager. A "password manager" is just a fancy spreadsheet protected by a master password. There is a bit of a learning curve but it's not hard:
1) Pick a great "master password" for 1Password. This is the last password you will ever need to memorize. A sentence is a good choice.
2) Whenever you create a new account, have 1Password generate a random password for you. It stores the password. Paste that random password into your web browser to login.
3) Once you get the hang of it, get rid of your old, carefully memorized passwords. Just have 1Password generate random ones instead. Start with your important accounts - gmail, bank accounts, brokerage, amazon, etc.
4) Add two factor authentication (sometimes called 2FA) to your accounts! This is another one that sounds hard but it's easy once you've done a few. That way, an attacker will need more than just your password to hack your account. 1Password can also store your second factor for each account. Again, start with your important accounts like gmail, amazon, etc. You'll sleep soundly and never look back.
I use LastPass and have a client that uses 1Password, so I have experience in both. I cannot say a ton about 1Password, and Adam does a great job above. I love LastPass. It's truly a game changer to use a password management system, no matter which you choose.