I've found juice is like collecting baseball cards - all too soon, you have more than you know what to do with, but it's so fun collecting and hunting that you just can't resist buying a few more here and there, just to see, just in case you find that holy grail this time...
So I treat juice like baseball cards - with a few high tech updates. On my computer, I've got a favorites list (restocking these is always my first priority when I make my orders), and a "to try" list (with notes about why I want to try them - who I heard about it from, why it's interesting, what site sells it, etc... so that I don't confuse similar names). Those are the lists I pull up when I make my monthly orders.... I restock my must haves and then pick one, maybe two new things to try. It keeps me on budget.
I also have three more lists - one is everything that's been traded/pifed to me, who gave it to me, and what I thought of the juice (so that I never forget all the wonderful good samaritans on ECF who have sent juice my way!), one is juices I've sent to others and what I sent them (so I know who likes what in case we trade again sometime), and one is juice I own that's available for trades/pifs (i.e. I either didn't care for it, or didn't have strong feelings about it either way, so I wouldn't mind swapping/giving it).
This all sounds hyper-organized and like I put a ton of thought into it, but if you could see the boxes I keep my juices in, you'd realize I'm the least organized person on the planet... all of this just kind of *happened* as soon as I had too many juices to be able to easily list them all from memory. It makes remembering which juice I wanted to trade and which ones I'm willing to steep a little longer and try again *much* easier.
So far, I've found very little that's unvapeable and many juices that I'm indifferent toward, but I've yet to have a juice on my "tradeable" list that *no one* wanted. One man's unvapable is another one's "that's not bad!"