Music
Spotify

Spotify has seen its fair share of controversy (including a high-profile tiff with Taylor Swift). However, it remains the best service, on PC or mobile, for streaming pretty much any music, whenever you want. The free service is a good introduction, but it’s worth picking up Spotify Premium. You don’t realize how annoying the ads are until they’re gone. Plus, the offline access is a god-send.
SoundCloud

Without a doubt, SoundCloud is God’s gift to indie music. It’s a simple, bare-bones service that allows anyone to upload and download music under a variety of licenses, and embed uploaded tracks across the web. It’s effortless and has a novel timed annotation feature, allowing people to discuss music in an entirely new way. SoundCloud is great, and if you want to hear the next big thing before the labels do, SoundCloud is where to look.
SongKick

Connect your SongKick account to your Spotify, Facebook, and Last.fm accounts, and you’ll be kept up to date about when your favorite artists will be playing nearby. You’ll also be shown the ticket prices from various merchants so you can quickly find the cheapest option. This is a simple, yet powerful way to ensure you never miss another live gig.
iTunes Store and Apple Music

Streaming music is great, but sometimes you want to buy tracks you can listen to offline. iTunes, since the release of the first iPod, has grown to dominate the music industry, comprising more than 60% of all music sales on Earth. If you want to buy music (or movies, or audiobooks), iTunes probably has what you’re looking for. It’s also heavily intertwined with Apple Music, Apple’s direct competitor with Spotify. Although it has a smaller library, for a similar monthly fee ($9.99), you have unlimited access to the entire library, ad-free.
Last.fm

Last.fm eavesdrops in on your listening habits, and uses statistical analysis to predict what you might like. By installing Last.fm’s “toggler” onto, say, your Spotify account, the service offers accurate recommendations for other artist’s you’re likely to enjoy.
Pandora

Pandora (US users only), is a great tool for finding new music. It’s a “free personalized internet radio”. Simply add a few of your favorite artists and the station will start playing related music that you’ve probably never heard before. Pandora is a great tool, and hopefully it’ll stay that way for years to come.