Pay attention to music formats. Music files come in many different formats. Some of these formats are specific to certain music players or music playing devices. Don't download music you can't use. What are you going to use to listen to the music you're downloading? Determine the type of file you will need.
A great tip to use when thinking about downloading music is to start using pandora radio. Pandora radio can be a great way to discover new music that's similar to music you already like. You simply create a station based around a song or artist you like, and it will playback similar music for you.
If you download a ton psychotic reaction band of music, it may be better to use a subscription service. Rdio or Spotify give you unlimited access for a monthly fee. You can then download music you like to hear offline just like if you were to pay for the download. It might be a more inexpensive way to expand your music library.
Before purchasing any music downloads, comparison shop around the Internet. Many websites online offer great deals on purchasing full albums. If you like an entire album and want to own each track, shop around for the best online deals. Some companies offer limited time sales on their albums or the service is just generally cheaper.
Be sure to check the file format before downloading any music. You've got to be sure that the file you get is compatible with whatever system you are using. If unsure, a good bet is to stick with MP3 files. This file extension is about as universal as they come.