Facebook, Twitter, Google+ ... Social networks for promotion
Social networks are a great opportunity to reach a bigger audience.
Here's an example what you could do:
Create a Facebook page about you, your music or your band.
Now you can link your Twitter account to your Facebook page, so if you make a tweet, it will automatically be posted on your Facebook page, even with a thumbnail.
If you also have a website or a blog and you have added the tweet button there, you already have 3 sites linked.
website/blog -> Twitter -> Facebook
So the advantage is, you just post your news or link once and it automatically gets spread to 3 different sites in total, which is a pretty good timesaver.
I don't know about Google+, but i am sure there is a way to put Google+ into the chain too.
If the content you shared is being liked a lot, you can hope it goes viral. That means the other users of the social networks share and like your link again and again and it spreads like a virus.
And you just had to push 1 button for that, remember?
It is also a good idea to have a Youtube channel. If you don't have a video for your song, just put a picture with your name or a photo together with your music and upload it to Youtube.
All the social networks have different users, so it is advisable to use as many of them as possible, if it doesn't cost too much time. A very importan point is, to link them all together. Youtube for example allows you to add URLs to your profile, so make sure to add your Twitter, Facebook, Google+ and your website address there, so people have the chance to find you and become your fan.