Where to get Sheet Music
classicalvocalrep.com Glendower Jones at Classical Vocal Reprints is the professional's number one source for sheet music. Only part of his catalog is online, but if you need it odds are he has it.
imslp.org IMSLP/Petrucci (International Music Score Library Project) is an amazing resource for any music that is out of copyright. PDF's abound.
artsongcentral.com Art Song Central is principally an archive and directory of free, printable sheet music for singers and voice teachers. An emphasis is placed on standard classical and traditional repertoire.
William and Gayle Cook Music Library @ Indiana University, not the most organized website but another wonderful source for printable music.
The Aria Database great source of information and some files, but if you need some new rep ideas...
How do I say that? What does that mean?
IPASource.com, is the largest collection of word by word translations and IPA (international Phonetic Alphabet) transcriptions. Currently over 12000 songs on there. Membership and fees apply.
Forvo.com is all about languages, it's goal is to have every word spoken by mankind to be spoke and recorded by native speakers. If you want to nerd out on specific regional differences in some foreign language... this is your site.
Fluent-Forever.com there are lots of language learning software, programs, books, and bootcamps. This one was specifically designed by former singer Gabreil Wyner, and his recent Kickstarter for an app using his method broke all previous app records.
The LiederNet Archive is the world's largest reference archive
of texts and translations of art songs and choral works with over 30,000 translations available
The Diction Domain, because one of these days you might want to sing in another language, and don't want to sound like a rube. Here is a great source for learning IPA (International Phonetic Alphabet) and how to sound like you know what you are singing about.
I'm ready where do I find auditions?
yaptracker.com although YAPS (Young Arists Programs) are in their title, they also list opportunities for singing including competitions, chorus auditions, solo opportunities with choirs and orchestras, opera and musical theater auditions from amateur to professional.
auditionsplus.com the other major source for classical singing slanted auditions. From the publishers of Classical Singer Magazine.
backstage.com mostly for theater and musical theater audition listings, but also you get some other cross over auditions in here, including film and tv
actorsaccess.com geared towards actors, it will include some auditions for singers, as well as film, tv, tours, and stage.
Wynton's 12 Wats to Practice, from Music to Schoolwork by Wynton Marsallis