Individual pages and articles

• Instrument Ranges (from Adler’s The Study of Orchestration)
• Score Preparation and Production [Scoring Notes]
• Writing Program Notes [Left Useless]
• Meet the Composer / New Music USA Commissioning Guide

Sites, periodicals, and podcasts

• NewMusicBox - online periodical of New Music USA, a grant and service organization
• I Care if You Listen - online periodical supported by the American Composers Forum
• Scoring Notes - online periodical and podcast about music notation and related technologies (you may know a regular contributor here)
• Instrument Studies for Eyes and Ears - a basic instrumentation/orchestration reference
• The Orchestra: A User’s Manual - another instrumentation/orchestration reference
• The Portfolio Composer - podcast about building a career as a composer

Books you might want to consider

• Elaine Gould: Behind Bars
• MOLA Guidelines for Music Preparation
• Samuel Z. Solomon: How to Write for Percussion
• Samuel Adler: The Study of Orchestration
• Kent Kennan and Donald Grantham: The Technique of Orchestration
• Jorge Variego: Composing with Constraints

Composition opportunities

• Society of Composers, Inc. Opportunity Newsletter (SCION) - requires SCI membership, which comes with some other benefits and is pretty inexpensive for students
• American Composers Forum Opportunities - free/open