Start with the news: LastPass was recently hacked
Their response to this was so impressive that I signed up almost immediately. I've known I should be using some kind of password manager for quite some time, but this pushed me into it.
The software and interface are way better than I had anticipated, allowing automated changing of passwords on some sites and notifying you of password breaches on sites you use, prompting you to change them.
Anyone else here using a similar service?