OK... after thinking on this for a while, I suppose this is the best tip I have that I have not yet seen on the site.
Hydro-bathing;
Even if you don't want to tractor your boobies with pressure, a set of Noogleberry or other cups with the cheapo hand pump NB sells will allow you the very best method of applying estrogen or other compounds in a VERY targeted way. (PS do NOT use any other pump, than the plastic one like NB sells, the metal ones sold in America will require you to use the liquid reservoir trap because the pumps will get nuked if you pump water through them) If you view the one pic or so I have of the domes in use look at the tips, its all liquid. But in this liquid are all the things I use herbally. Combined with other ingredients that allow more rapid trans-dermal action Like a drop or two of isoproyl alcohol, or ... PEPPERMINT N CINNAMON. Which I think I double dosed in the right dome this morning as its currently singing in high pitch!! (OMG I LOVE THIS STUFFF ... thank you ZaraAri!)
if you look at the shape you will notice that only the tip and top of the breast are soaking meaning it has to travel from there all the way through the breast and then chest to get to anything like an internal organ. NOW THAT IS LOCALIZATION. So if you want to be able to do high doses of your fav substance, here is a way to do it right to the point without altering your emotional status by flooding your body through the normal channels. Bypass the liver completely and go right to the spot you want. Now before you do this and come back with, damn, thats a lot of work and gets messy here n there, just how bad do you want boobs? Are you willing to add some work to the mix...because its SOOOOOO worth it. Yes of course it still travels through your blood stream but it has to pass through the targeted area to get there and in an hour or less, there is not a whole lot that can FLOOD your system like taking it orally.
Method;
I use a curvation bra in my size, mark the nipples and cut about a 3" hole, adjusting as need be to accommodate the cups in the correct positions Once this is done and fits correctly the rim on the cups should keep the domes from coming through, just like a hands free nursing setup. After learning just how much liquid I can use and hold the cups on with (usually just filling the domed part) I lube up with oil, put on the bra and bend forward a bit, the bra holds the cups so I can pour in the liquids and additives that I use for each dome. Then Having spread a towel or two on the bed I simply lie back with my feet still on the floor and make sure the cups are in place so no liquid escapes. Then I pump each one till all air is removed, and keep that this way for anywhere from 15 mins to an hour after which I either loosen and then crank down or just crank down depending on how they feel/react. How far to crank down is something that you can only learn from experience. .... sorry. Also I would like to add that you should look at this like any other form of exercise stretch a little first, warm up, then go for your goal, then cool down, then rest. So when I finally let the cups down, I don't just take them off.... Ill take off the nipples of the domes and let them settle when all pressure is back to normal I put them back. Now my breasts are at their largest in the cups with no pressure and can soak up more nutrients. try it ... see if you like it.
After thoughts ...
Cupping;
If I had it to do over again and were starting from square one .... I would start with a complete set of NB cups and about three pumps, one for air, one for water, and one spare.
I would use each cup set one day each and rotate, even if the biggest one required being used one at a time. I would also get some extra cupping items and that full set for Kangzu and cupping would be awesome. That way you can just hit under or over boob or fill in the gaps when you just dont have ability to go with the big set.
OIL;
Grapesseed is best, no mess if you dont spill it, and does not go rancid and most closely resembles the components found in your body. Its rather easy clean up compared to others too. More to come, .... but I have to go crank down on the girls ... they have been soaking for an hour, now to MAKE MY TITTIES GREAT AGAIN!!!
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) I really look forward to reading your tips!! 
glad i did not put in the cinnamon on the first pass, might have been a bit to much for the first pass....whew.
I found that there are many of the substances I Hydro with help a bit, not totally but a bit. I have had a good experience with Nuetragena Hydration skin lotion though.