just about everyone is recommending changing every single password you have and for some this can be a right nightmare
most people just use one pass for all sites which is dangerous to start with
but ive been using my own password manager for the last 2 years and its great and saves a lot of time
it lets you keep all your passwords securely, password protected - stick the software on a usb stick because ive made it portable.
if enough want a copy to warrant me updating it ill be happy to oblige.
edit: here we go lads: [Only registered and activated users can see links. ]
there you go, I use it all the time lads. nice, simple and easy to use