How do you add songs to your playlist on Grooveshark?

When you first arrive on Grooveshark, there is a search box. Type in the song or artist name that you want and when you find it, hover your mouse above it. All the way to the left of the highlighted blue song, there should be a plus button. Click this and it will automatically add to your playlist. Or, you can click it and drag it to any spot on your playlist.