For many years, I've been using a simple scheme: a prefix/suffix that's the same for all passwords, and identifiers for the service and username. For example,

For many years, I've been using a simple scheme: a prefix/suffix that's the same for all passwords, and identifiers for the service and username. For example, something like this [$#__1077__#$]---!SERVICE!USERNAME! So, for Hackernews, I would use h for hackernews and t for theduke --> [$#__1077__#$]---!h!t! Now all I have to remember is the template and my username. For accounts that need regular password changes I'll add an additional part that identifies the year and the quarter. Of course, if someone where to get a hold the cleartext password for one site, they might be able to figure out the scheme and get into all my accounts. But that's a risk I'm willing to take (except for very important accounts/passwords, which get randomly created).