I have one simple master password. I modify it slightly based on the url of each website. I have a text file backed up on Dropbox with any special rules for t

I have one simple master password. I modify it slightly based on the url of each website. I have a text file backed up on Dropbox with any special rules for the password on each website (e.g. "turbotax: capitalized + bang"). Works great as long as you can resist the urge to tell other people about your system!