I've been putting a yoga cert into the works for a few years now. I have heard over and over from teachers, local and not, that doing an intensive yoga certification (like one that runs for 30 days straight) is so much more valuable than one that runs Friday-Sunday for 6 months if you can make an intensive work. The places I have been looking at are Kipalu in Massachusetts, Kalani in Hawaii, and the Jivamukti Center in New York. The Jivamukti intensive is REALLY freaking expensive and they want you to sign a waiver saying you will follow a strict vegan diet while training. I don't necessarily have a problem with that, but I mainly looked into getting certified to teach Jivamukti because it is my favorite style. However, I have been looking at just getting certed in general hatha, then just adding the elements of Jivamukti that I like in my own teaching skill. Anusara is another good one, but it is a pretty elite group and getting certified is a really in depth and lengthy process. The best, I found, is to just ask your own teachers where they got certified or where they recommend. Making money as a yoga teacher is hit or miss, just like making money as an artist; some places yoga teachers make big bucks just off teaching and in others, yoga teacher have regular jobs and do yoga on the side. You could look into the Yoga Alliance which is a nationally (and possibly internationally) recognized yoga certification. I kind of gave up on being worried about whether or not the curriculum I was going to do was truly "certified" or not because it mainly doesn't matter where I live. If you like exotic locations, check out Yogi Nomad; they do intensives all over the world!! Hopefully some of these resources help!! :)