you the man. I might be bugging you a bit about this. Where does one go to start this endeavor?
I started DIY with ecigexpress, getting everything I needed there except the nicotine base, which I
used to get from Box Elder. I still recommend ecigexpress for people starting out because they have flavorings from a large selection of manufacturers as well as other DIY necessities (syringes, graduated cylinders, pipettes, etc), which allows you to get a lot of different stuff with only one shipping cost. My current nicotine vendor is rtsvapes.
One of the many great things about DIY is you can start small (and therefore cheaply) and work your way up to having a more extensive and flexible 'lab'. You want to start small and simple, and progress your way up to larger batches and more complex recipes.
For the sake of example, let's say you want to make a blueberry juice at 24mg with a 50/50 mix of pg and vg. Start with a 60ml bottle of 48mg nic in PG (the smallest size rts sells) and pick up a bottle of VG from the store. Get a few disposable pipettes and some 10ml bottles, and a small bottle of blueberry flavoring. You now have everything you need to make 120ml of vapable blueberry juice. Say you want your flavor to run 10% of the total mix, so your bottle will have 1ml flavor and 9ml of base. Fill a pipette with 1ml of flavor and squirt it into the 10ml bottle. Take another pipette and fill it with 4.5ml of the nic in pg and squirt it into the bottle. Take another pipette and fill it with 4.5ml of vg and squirt it into the bottle. Put the dropper tip on the 10ml bottle, put the cap on the tip, and shake the bejeezus out of it. You're done mixing, you now have a 10ml bottle of 24mg (give or take, with the flavoring taking up 1ml of volume it's more like 21-22mg) 50/50 juice. You can get more accurate with various ejuice calculators, but I'm a simple man with simple needs.
Personally, I like to heat-steep my juices by letting the bottles sit in a running hot-water bath (bottle sits in ashtray, ashtray sits under a hot dribbling tap) for an hour or so, giving it a good shake every 15 minutes. I find the heat-steeping process helps the components mingle better and brings the flavor out a bit, but YMMV. Most juices will taste better if you let them sit for a few days/weeks in a cool dark space after mixing, but it's up to you.
Clean your pipettes and re-use them next time. They say disposable but you can use 'em over and over if you keep them clean between use. You can get into much more complex recipes, but the creation process is still essentially the same. Some people prefer to use graduated cylinders and syringes and stuff like that for improved accuracy, but again, this is something you can build up to.
