I still track all of my accounts in Yodlee, which is somewhat controversial because if someone found my password for Yodlee, they would have access to all my accounts. The flip side is that I can see almost immediately if something funky is up with one of my dormant accounts. Just now, I noticed that my old US Bank card (which I never use) had a charge for $80 on it, which ended up to be some random charge from a Spanish soccer team?
Anyhow, I called them up and had it all taken care of. I probably would have gotten wind of it when they sent me a statement anyways, but that could have taken a month. I also keep my Yodlee login and password completely different than that of the rest of my accounts for an extra layer of security. One company with lax security and all will not be lost.
Of course I’m sure many people, including my father, still keep all their passwords on Post-It notes taped to the side of their computer monitor. You know who you are!