When you found a music file that you want to download, be sure to check the file size. Most music files are between two to five megabytes in size. If you see a file size under 250K, it is likely that it is a text file with malware. Do not download these.
Want to speed up loading iTunes? Delete the smart playlists you never use. You will find them under Playlists in the menu bar on the left. Just right click and choose Delete on any you never listen to and you'll find that loading iTunes speeds up dramatically just with that one fix.
Google's music downloads are the way to go if you are an Android user. This service from Google is Music All Access. It's like many other subscription services, except it works great for Android devices. You can gain access to their massive library for just $10 each month.
The Internet Archive isn't just about archiving websites. It can also give you a list of great MP3s for free that aren't hard to download. Everyone can have the advantage of accessing all of the music that they plan to archive, so give it a stoner rock try. The Internet Archive has a large catalog of music for you to choose from. Here you can find many free downloads. Their goal is archiving the Internet in its entirety, allowing everyone to benefit.
Keep an eye out for promotions when looking for digital music. Check back often, you can often find freebies as well. What music do you already have? You could end up inadvertently downloading a tune you already own. Search your download history and music library to double check what you've already bought.