Use a password manager, remember a 2nd password for your email yourself, and then use a second factor for as many things as possible. USB keys are best, but anything is better than nothing: SMS, Authy, Google Authenticator, phone call, whatever. Chrome and Safari both have password managers these days, and some Chromebooks even have a builtin second factor. 2FA is still a hassle for sure, but it's getting better all the time.