How to get more data on my iPhone?

I have an iPhone 4 and don't have a lot of data left. What I don't get is my phone has 8GB and 5.8GB where used but I only have 726.76MB. I don't have any music and not a lot of apps but I have 1, 800 pics do pictures take up a lot of data can you guys please help

You'll have to delete some things, get rid of photos you don't need or upload them to websites that also have apps like instagram where you can store your pics. Also, even though phones are sold with a label stating it's memory, you often lose a bit over a full GB automatically because of the apps and data that is PRELOADED onto your phone.So, you're kinda of lied to about the actual memory of your phone: P

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