Where does one draw the line between being frugal and being an OCD packrat?

[MH1]

12. Have a strategy for saving/discarding items that have potential reuse.

If you don't have a strategy, then just saving things willy-nilly because you don't want to throw them away, has probably crossed that line that you're concerned about.

By strategy I mean something like this: I save glass jars of useful sizes. Sure, I could recycle them, but often I find that a small honey jar is just the right size for something. So, I set aside a space where I save useful-looking glass jars. (The un-useful-looking ones get recycled immediately). When the space fills up, I either don't save any more, or I first toss at least one item to make room for the better item I want to save. Often at that time I'll review the whole space and find I've saved 6 of something I rarely use, so maybe I'll keep one and toss the rest.

That's just an example. I try to do that with everything that I have trouble discarding. (I'm not 100% successful at it, but my house isn't too cluttered, so I'll give myself at least a B-minus.)