How to manage storage on my IPhone?

I have the iPhone 5, I have the 5 GB, I have close to 900 songs, i tried downloading a song, it says storage full… Not that many apps that I downloaded, just like FB, Twitter, Instagram, fantasy baseball and a few games, and team stream, I deleted Facebook and put it on my home screen via safari. So how can I make my storage better instead of having to delete apps and going on safari to use them?

You can't have a 5gb iPhone:///

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