I recently spent six months living in Moscow, prior to which I had already lived in the city for two months the previous summer. When I first arrived, I was very confused about how to attend the Bolshoi - finding tickets, finding the theater itself, which seats were the best, all seemed disorienting. My first month of living without my student pass, I couldn't get tickets at all! Since then, I've gotten to know a lot about how to navigate the waters and I've assembled this information in one post on my blog:
I've directed my comments at English-speaking tourists. There are probably still lots of things I don't know, particularly about ways of buying cheaper tickets, so if anyone wants to add those to the comments on my site, I'd appreciate it - or if you prefer to post them here, I'll edit the blog to include your info.
I hope this helps anyone traveling to Moscow - I know seeing the Bolshoi in its home is a special experience, and I'd love to be of service to any fellow balletomanes.