I made a cool 5 word passphrase back then using the old Diceware method and use it as a master password. The question is: as computing power increases, will we need to add more and more words to our passphrases which we will eventually forget? I'm in my mid 30s, will passphrases be enough in my lifetime? :) So back then, Diceware suggested just 5 words, not the original Bitcoin QT client recommends 8 words. Will the original 5 words from the Diceware age serve me in the Bitcoin age?
I don't really want to mess around with a Yubikey. Heck, I Googled it and didn't really managed to find out what it is, what it does. Maybe I'm not the target market. I'm just a simple user. Carrying around a Yubikey would also be a red flag in my eyes. He has secrets!
How effective is doubling a passphrase? Like I have now [passphrase] and simply doule it: [passphrase][passphrase]. So I don't really have more stuff to remember, just more stuff to type. That might serve me for a time.