I have a lot of 'other' data on my iPhone 4 summary on iTunes. I looked on the internet it said stuff like you should restore it etc, but i would like to keep all of my data. How do I reduce the amount of 'other' data which is around 3.5 GB

Hi,

On my macbook pro, I have connected it with my Iphone 4, on the summary it says that I have 3.5 GB of 'other' data, which is bigger than my photos and music. How do I make this smaller without losing all of my data in a restoration. I do not kno what the difference is between a normal restoration and a restoration form back up. Also i have already tried deleting old messsages and book marks but nothing is working. I searched on the internet and it said something about it being corrupted!!

Please Help!!!!!!

Thankyou!!!