If you are having problems remembering your passwords there are many applications that you can use that can create passwords for you and that can store them in your computer, this way you can generate unique and almost impossible passwords to crack with just a few clicks, you will need to dedicate some time to store and to create new passwords but once everything is set up it is very easy to log in your wallets and exchange accounts knowing that they are now very safe.

And if you also add  two factor authentication then you are going to be as safe as you can be and you can forget about losing your coins to most hackers since they do not have the skills to overcome a well structured defense against them.