That depend on what nic level you are trying to achieve. For example if you are starting with a 24mg
juice and you want to get to 12mg then you mix it 50/50. IF you are starting with 24mg and want to get to 8mg then it is 1 part
juice and 2 parts glycerin.
It all depends on your personal taste. Realize that the more you dilute a pre-flavored juice the more you dilute the flavor as well. Most of the better juices hold up to a 50/50 cutting pretty well.
Of course, you can go with unflavored juice, cut it, and then add your own flavor.
THe possibilities are endless...........