Alright, I’ve gotten a few questions about this here, on other sites, and even more on Reddit, so I figured I’d drop it like it’s hot.
Everyone’s got their own system for mixing, and more specifically Single Flavor Testing (SFT), and no ONE is right for everyone, but this is mine.
Organization:
If you’re not organized, single flavor testing, or even mixing can rapidly turn into a shit show. I’m almost ALWAYS testing something, flavors, mixes, finished juices, Betas, and personal mixes, etc., so keeping everything organized can be a chore but it’s mandatory. I typically keep my series lined up, in alphabetical order, ready for mixing/testing.
Research/Mixing Percentages:
This can be a PITA, but you MUST lock in what strength to test flavors at, and I’ve gotten it down to a science. New flavor lines, Betas, or even 'New To You" flavors/manufacturers can be much harder to determine, especially if there’s no good information out on them, so trial and error sometimes needs to happen. Within reason I try to test most flavors in a series at the same strength, but there are always exceptions due to very weak or stronger flavors. This way the reader can have some “relative”-ness between my reviews.
If flavors have been shipped specifically by a MFG or Reseller, I verify whether or not they are PRE-Releases or not, and whether my results should be Private or Public (kind of a big deal). Once the percentages have been locked in, the next step is to pre-document, make the labels, and mix them up !!!
Equipment/Tools:
I typically use 10ml LDPE bottles for testers, and regardless of the bottles, or bottle type(s), I always use these removable labels.
https://www.amazon.com/dp/B01926WM4Y
Because I very often have multiple series steeping or testing at the same time, I use different colors to keep them separate.
My main workhorse scale has always been the LB-501.
The only VG/PG bottles I use for small batches, or testing are the large twist tops from Liquid Barn.
CAL’ing the Scale, and Prepping Labels:
The LB-501 comes with (2) CAL-ibrating weights, so I always CAL it before starting, and write out all of the labels.
PRE-Documentation:
You can physically write notes down, but that can be time consuming, and un-searchable so electronic notes always seem to win out. I keep all of my root files locally, then paste them into a “Recipe” on ELR, and the VC, and then create a forum post cross-linking to/from it.
As you can see above, every bottle will get the same exact NIC, PG, and VG. I always add NIC to my testers, and it’s the first thing I add to each bottle. In this example, every bottle gets 0.31g NIC. Typically if I’m doing 24 flavors or less, I’ll manually add both the PG, and VG, but on larger batches (assuming the flavors are tested at the same strength), I’ll use a pre-mixed VG/PG mix, so the base only takes one step as opposed to two. I always shake up the flavors before adding them. I then line up the series, and let them steep. I don’t have a set steep time, but typically between 1-2 weeks before testing.
Standing Watch:
Always post a guard to keep watch while the flavors are steeping. 
NOTES:
Despite what you may think, this is probably the HARDEST part for people to actually DO. TASTING aspects may seem challenging, but actually writing them down in a way people can actually relate to, and understand can be hard at first. The GREAT NEWS is, it just gets easier, and easier the more you do. EVERYONE should take notes on their flavors, mixes, recipes, etc., as they are INVALUABLE, even IF, you decide to never share/publish them.
Probably the most POWERFUL thing about “noting” is you can ALWAYS edit them. Smelling the flavors in the bottle, initial thoughts, thoughts after finishing, write them ALL down. ANYTHING that pops in your head, write it down. You can always add/delete/edit later, just get them OUT of your head, and written DOWN !!!
FINALIZING/Cross Posting:
The last step in MY process is finalizing the notes already taken and Published on ELR and the VC, typo checks, etc., and then I deploy them across all of the other sites I publish them on. A typical user most times won’t create “Recipes” for their tests, or cross post on multiple sites, but because I typically do entire series tests, they can be FAR too long to list all of them in one place. Each one is in it’s own area/thread, and then I keep a directory of them all (thanks @mikser), in the Base Camp.
Well there you go, that’s ALL you have to do hehe, well, it’s what I do. I hope this helps clear up the system that I use, why I do, and how/why it works for me. As always, my notes, or anyone else’s can indeed help you, save you lots of time, and help guide you, but ultimately there is NO better flavor tester, and notes, than YOU.
Happy Mixing guys/gals, and please do NOT hesitate to test flavors yourselves, and keep notes. Sharing them, makes it better for EVERYONE, as you might actually taste things, or describe them in a way that no one else does, and that can really help us all out.
