[mcv]

If you reuse passwords, separate throw-away accounts (like Adobe or pretty much anything that's not your email, your bank or PayPal), from the important stuff.

Sites that need to be secure, hopefully really are secure. Sites that don't really need to be secure because they don't deal in anything of value, probably don't invest quite as much in security. Reusing passwords across those different kinds of sites means the extra security of the secure sites is wasted.

Of course it's way better not to reuse at all, but remembering two or three passwords is a lot easier than dozens, and still a lot safer than just one.