Never pinned glutes?! Wow, thats the easiest one haha. Glutes, quads, delts, lats is the rotation I use. I dont put more into the delt than 1.5ml at a time. Quads, 2ml, glutes, 3ml, Lats, 2.5ml. I also will sneak in some Bicep and rear delt shots. Once in awhile, I hit the long head of the tricep. Those are all small shots, like no more than 1ml at a time, if not less. There are good picture guides online. Check out this article. 

http://juicedmuscle.com/showthread.php?49-A-Guide-to-Safe-Injection-Technique

Its a pain in the ass to do ED shots, but it does allow for less oil per shot, which is nice.