[Snortibartfast]

You only have to remember one password, the strategy is the same for all passwords, replace the fifth character (for example):

google: mojko2if6bibe78

youtube: mojku2if6bibe78

yahoo: mojkh2if6bibe78

Note that I don't advocate this strategy for high-security applications, but for throwaway accounts that you might want to access when not having access to your password manager it might be useful.