Passwords are your first line of defense when it comes to security and privacy on the internet. If you have a good password manager such as 1Password you can use its password generator to create strong passwords for all your needs and manage them easily. But you still have to come up with a strong password to open the 1Password or any other password manager.

It is more difficult to come up with a secure password than you may think; there are nefarious identity theft folks out there who make a substantial income proving that every day. To “roll your own” password for a password manager or any other need, I highly recommend Diceware, a method for selecting completely random words using dice.

For more information on Diceware:
https://en.wikipedia.org/wiki/Diceware and http://world.std.com/~reinhold/diceware.html