Everyone has a lot of password and you most likely, like me, can't remember them all all the time. There is a great piece of software out there called Keepass that lets you keep all your passwords locked up in a digital "password safe" encrypted and all. Keepass is simple to use and works really well. Too well in fact, since you will most likely forget all your passwords once you start using it! Having a local copy is the way to start off, but when you have multiple computers you will most likely want your Keepass database to move along with you. This is where Dropbox comes in. If you're tech savy you most likely already have a Dropbox account. The way that Keepass and Dropbox unite is to allow your password database to sync between all machines as you update it. Before you start anything, make sure you have Keepass and Dropbox installed on all computers (and mobile devices) you want your database to sync to. Then just drop your Keepass database file into a folder on your Dropbox account and make sure all devices are set to sync that file. Once the database is there, just point Keepass to the new, Dropbox location of the database file and any changes you make will not be made to all machines.
Get Dropbox Here: Dropbox.com
Get Keepass Here: Keepass.info