When it comes to streaming music, Pandora gets all the attention--but I've always been partial to Slacker. Like Pandora, it creates a custom radio station for you. Unlike Pandora, it doesn't limit you to a single artist. Rather, you build your station based on all the artists you like.
The free version of Slacker limits the number of songs you can skip, plays and displays ads, and shows only abbreviated song lyrics. If you want unlimited skipping, no ads, full lyrics, and other goodies, you need to subscribe to Slacker Radio Plus.
That normally costs $4.99 per month (well worth it for anyone who listens to music all day, every day), but for a limited time, you can get a month of Slacker Radio Plus absolutely free.
What's the catch? For most users, there isn't one. All you need is Windows 7 and Internet Explorer 9. With those two items in place, do this:
1. Head to the Slacker site.
2. Drag the Slacker icon from the Internet Explorer address bar all the way down to the Windows Taskbar, then drop it.
3. Click the new Slacker icon to open the site.
4. Right-click the new Slacker icon to bring up its Jump List (which is pretty awesome, by the way), then click Get Slacker Radio Plus FREE.
That's it! Now you've got a month of Plus. (Curiously, when I went into the settings for my account, it still showed me as a Basic subscriber. But the Plus upgrade had definitely been applied, as I was no longer hearing the occasional ad, and I could see complete song lyrics.)
You've got until May 31 to take advantage of this offer. Alas, it applies only to the Web-based version of Slacker. Your Android, iPhone, or other app won't absorb the benefits of the freebie.