I've been really pleased with LastPass as a password management plugin for Chrome. It has the ability to store and generate complex passwords for all your sites as well as store encrypted notes about each one.
Just make sure to turn off the "Automatically Fill Login Information" option if you work in Systems Administration. Just the other day it updated this information on a site I was using without me noticing. I had to scramble for the valid username and password before systems started throwing alerts.