Whatcha into? Teas? Crystals? I have no idea of your knowledge, so I'll assume none and begin rambling now
Myself, I haven't ventured into the world of extractions, but I have made teas. My number one rule of thumb, if you have 'incense', never attempt to tea it. Just don't. It doesn't work. Even though I was warned, I didn't heed them. Save yourself the trouble. The powders are good for consuming as is (mixed with pudding etc. but so much material is hard on your guts) or capping (never done so myself, but that's a LOT of gelatin and cactus material for the gut to process) and extractions (the best use of powder imo).
Now, if you're dealing with fresh SP, teaing is a phenomenal way to extract all that magic into a concentrated goopy brew. One technique that blew my mind with 4 feet of SP was this:
http://forums.mycotopia.net/holding-tank/45397-irishlions-cactus-tea-tek.html Obviously, there are many different ways to achieve the same end, but I found this one to be fantastic, though I did not bring the mixture to a hard boil, but a simmer throughout. However you choose to tea it, try to keep heat to a minimum in terms of temperature and exposure length. Mescalito no likey. Also check out ANC's tea tutorial and extraction, not sure where it is though.
Once your tea has been reduced to your desired amount, you can slam as is, or continue to extract from from the brew. I have no experience there, so I'll let our fellow brethren educate you there
