Summarize the following:
Depending on where you're submitting, you will need to be able to send in your music on a physical CD or electronically through a digital format such as MP3.  For CD distribution, you usually don't need fancy packaging or elaborate press kits. In fact, many radio stations will request that you not send in materials like this. Some musicians insist that a plain silver CD-R with your name and the song title, accompanied by a track listing in a clear plastic case, is all you need. Whatever packaging you choose, make sure all your information is clear, complete, concise, and correct. You don't want a music director to fall in love with your song only to be unable to figure out who it belongs to! Some radio stations may accept email attachments, but more often if they accept electronic submissions they will want a link to an online source for your music. You have many options for digital distribution.  If you want your music more publicly available, you can use services such as iTunes, Amazon Music, or Bandcamp. iTunes allows you to sign up to sell your music for free; Amazon Music requires you to use a distributor to sell your music through their Digital Music store. Bandcamp is also free to sign up and is becoming increasingly popular with artists. Examine several options and choose the best for your situation. You can also get your music online by using websites such as YouTube or Vimeo. Read the Terms and Conditions for any website carefully; you want to make sure you keep your copyright and permission to sell your music! Sites such as Soundcloud, Mediafire, and Sendspace operate legal file sharing services that allow music directors to download your music without having to worry about viruses and other safety issues. You may or may not be requested to submit a press kit with your music. However, it doesn't hurt to have one ready to go. Most press kits include several basic elements that will help people get to know you quickly.  Write a cover letter. This should be addressed to the person to whom you're submitting your music. Include your contact information, any webpages (YouTube, Facebook, website, etc.) that you have, and basic information about your music (genre, themes, etc.). Write a short biography. This should be a short description of you (or your band, if you have one) and your accomplishments so far. You can talk about your influences and interests here, but keep this part story-oriented. Consider it like your introduction to a new friend.  Create a "fact sheet." This should include the essential information about you: name, style of music, other artists/bands you are similar to, instrumentation, etc.
Prepare your music for distribution. Make your music easily shareable online. Compose a press kit.