If you are having lots of data in your iTunes then there are chances that your iPhone and iPod will tend to be slower in the performance.But now you can easily handle this problem of your iPhone or iPod with the help of BackOff.
BackOff is a simple application which helps in increasing the speed of your iPhone or iPod Touch sync by simply turning off the automatic backup in the iTunes. But since it will turn off the back up of your data, you can lose some of your data. So, use it carefully. BackOffis compatible with iPhone V1, 3G, 3G S and 4,iPad,iPod Touch V1, V2 and V3 and iTunes 10.
You can download the BackOff by visiting the link --> http://www.digidna.net/products/backoff/download