How to stop using so much data

I have an iPhone on Verizon and only have 2GB of data a month and I'm ALWAYS reaching the 2GB and having my data cut off a week before my month is over, leaving me with no internet for a week unless I'm on Wi-Fi. I'm always on Wi-Fi when I can be and the only apps I use are snapchat, instagram, twitter and rarely facebook. How do I use so much internet? My location services is off too!

Viewing video will use lots of data right? Stop using snapchat…

  • Why is my iPhone 5 using so much data? I just got my iPhone 5 four days ago, and I've already gone over my 200mb data plan. Before I had the iPhone, I had a Blackberry Torch 9800, and I've never gone over my data plan. I use the phone the same amount as I used my Blackberry, and I'm connected to Wi-Fi throughout 90% of the day, and rarely use data. So why am I going through my data so quickly?
  • Why does my iphone stop working after I change the date and how can I stop it from doing that? I changed the date to this day 5 years ago so I could extend my spotify premium trial (this actually works) but then me texts weren't sending or receiving same with BBM and Facebook and literally every other social network app and I couldn't connect to the App Store so I changed it back to auto and everything works but I want to stay on my spotify free trial please help
  • When using Kik messenger on iPhone with your data plan, how much mb does it use? I'm getting an iPhone, and I tend to use kik messenger a lot on my blackberry already. How much mb of Internet does Kik use to send and/or receive messages, and picture messages? Is 500mb too low for someone who tends to use it a lot without Wi-Fi? Answers are greatly appreciated.
  • Using my O2 free mobile data in Spain - do I turn data roaming on or will this charge? It's now free to text and call and use mobile data in Europe and I'm on contract with O2 and have unlimited everything. I'm just wondering if on my iPhone I have to turn data roaming on to get this or will this charge me? How does it work? As when I turn on my mobile data without data roaming the 3G doesn't work until I actually turn on data roaming?