Still using the same passwords for multiple websites, stores, and (gasp!) online investment accounts? Here’s a much simpler, safer solution. I don’t actually re-use passwords for any of my online accounts except ones I don’t care at all about (such as those for free services, forums, etc.). Hopefully, you don’t either. For years, though, we used a little black address book, stuffed with Post-Its to save our (unique) passwords. That…