Using a secure password is a must. Unfortunately, most people not only use insecure passwords, but they use them on multiple sites, as well as the same username or email address. This is a huge mistake. The reason being, is if a website or service you use gets compromised, and the password is exposed, this not only affects the website in question, but any website you used that email/password combination for. This is why it is important to utilize password managers. The best password is one you don't know.
Password managers are, usually but not always, software or a service in which you use an extremely strong "master password" to keep secure, and in the manager, you store all your other passwords. The good password managers come with built in tools to generate strong passwords for the services or websites you use. There are a few out there, but here is a list of the most common. Each comes with its pros and cons.There are two types of password managers as well. Which you choose to use is up to you,but you must be aware of each. There are online password managers and offline password managers.
Online password managers are easier to use for the average person because the server itself takes care of the syncing for the user. As long as you log into your account on your devices, the passwords will be there as well. The main downfall of this model is that you are trusting a third party with your most sensitive information. While the data is E2E Encrypted, there is still that level of trust. There are also paid, and free options. The top three online options are listed below.
Offline password managers are a bit more secure, as they are not stored online, or controled by a third party. The main drawback about offline password managers is that you as the user are responsible for maintaining, syncing and backing up your data base. If you mess this up, the only person to blame is yourself. The top two offline password managers are listed below.
Another option, is an old fashioned notebook. While not as "high-tech" as our other options, if this works better for you, it's well worth it so long as you remember never to use the same password, or even variations of the same passwords across services. Also, make sure you keep it in a secure location, and have a copy of it also in a secure location.
So, as with almost everything, you need to decide, security over convience, or convience over security?